• Title : Detached Forts about the City of Lyons
• Date : 1856
• Condition: (A) Very Good Condition
• Ref:  90123
• Size: 29in x 20in (735mm x 515mm)

Description:
This large original lithograph print, schematics of various forts in and around the French city of Lyons - during the time of the Crimean War and just prior to the American Civil War - was engraved by John T Bowen & co. of Philadelphia and was published in the 1856 edition of Captain Richard Delafields Report on the Art of War in Europe in 1854, 1855, and 1856.

In early 1855, Captain Richard Delafield was appointed by the Secretary of War, Jefferson Davis, a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.

General Definitions:
Paper thickness and quality: - Light and stable
Paper color : - off white
Age of map color: -
Colors used: -
General color appearance: -
Paper size: - 29in x 20in (735mm x 515mm)
Plate size: - 29in x 20in (735mm x 515mm)
Margins: - Min 1/2in (12mm)

Imperfections:
Margins: - None
Plate area: - Folds as issued
Verso: - Folds re-enforced with archival tape

Background:
The ceintures de Lyon (Belts of Lyon) were a series of fortifications built between 1830 and 1890 around the city of Lyon, France to protect the city from foreign invasion.
The belts comprised two defensive barriers that included forts, lunettes, ramparts, batteries, and other defensive structures. Many of these structures proved to be ineffective in war due to advancement in weapon technology and the evolution of attack strategies at the time. Some of the fortifications of the ceintures de Lyon have been destroyed, though many remain today.
In 1830 the maréchal de camp, Hubert Rohault de Fleury, commenced a project designed by military engineer Baron Haxo. With a budget of 10,000,000 francs (approximately €67,000,000 as of 2015) allocated for Lyon between 1831 and 1839, this first project included the restoration of the fortifications between Croix Rousse and Fourvière; the construction of two forts on the plateau of Caluire (Fort de Montessuy and Fort de Caluire, connected by the Enceinte de Caluire), facing the Dombes; closing access to the Presquîle by the construction of a south-facing building; building two forts – Fort de la Duchère and Fort de Grange Blanche – to protect access routes towards Paris and Auvergne.
The fortification of the city is divided into three sectors: The north was protected by the wall of Croix-Rousse and the structures between the Rhône and the Saône. The command was situated at fort de Montessuy. The west was covered by the hillfort of Fourvière and the associated forts of Vaise at Sainte-Foy. The command was situated at fort Saint-Irénée. The east was defended by the Redoute du Haut-Rhône and Fort de la Vitriolerie on the left bank of the Rhône. The command was situated at Fort Lamothe.
The work required almost 20,000 workers, which were locally sourced in an attempt to avoid insurrection such as the ongoing unrest of the Lyon silk workers (Canuts) over increased capitalism. Work began in 1831 to build seven structures, each structure requiring between 400 and 500 workers. The scope of this project included the construction of Fort de Montessuy and Fort de Caluire to the north; Fort des Brotteaux, Fort Montluc and Fort du Colombier to the east; the Redoute de la Part-Dieu to the west; and Fort Saint-Irénée, to protect the entire area.
In January 1831, an uprising began at a work site in Charpennes, however it was quickly stopped by the army. Other insurrections took place the same year, a series of Canut revolts, which succeeded in rallying soldiers on the side of the Canuts, resulting in the death of captain Viquesnel, aide-de-camp of Fleury, and the temporary withdrawal of the 20,000 soldiers who eventually retook the city in December 1831.
In 1832, three other structures were built to reinforce the defenses to the east: The Redoute de la Tête dor, Fort La Motte, and the Redoute des Hirondelles. A treaty was signed between the city of Lyon and the War Department, which stipulated that the city had to cede the land necessary for the construction of military buildings to the War Department, while the forts themselves would still belong to the city if the military decided to abandon them. It is thanks to this treaty that the forts of Croix Rousse, Fourvière, Loyasse, Vaise, and Saint-Jean would later be returned to the city.
Construction resumed in 1840. First the Fort de la Vitriolerie in 1840, then Fort de Sainte-Foy-lès-Lyon and the Lunette des Charpennes in 1842, Fort de la Duchère in 1844, the Redoute du Petit Sainte-Foy-lès-Lyon in 1852, and finally the Redoute du haut-Rhône in 1854.
A law was voted in on 10 July 1851, which defined the methods of destruction of these buildings or construction on their land. By 1854, 19 structures including 10 forts had been built around Lyon, creating a nearly 14-kilometre (8.7 mi) fortified perimeter.

Delafield, Richard Major General 1798 - 1873 - Delafield was a United States Army officer for 52 years. He served as superintendent of the United States Military Academy for 12 years. At the start of the American Civil War, then Colonel Delafield helped equip and send volunteers from New York to the Union Army. He also was in command of defences around New York harbor from 1861 to April 1864. On April 22, 1864, he was promoted to Brigadier General in the Regular Army of the United States and Chief of Engineers. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866, reconfirmed due to a technicality on July 14, 1866. He retired from the US Army on August 8, 1866. He later served on two commissions relating to improvements to Boston Harbor and to lighthouses. He also served as a regent of the Smithsonian Institution.
Delafield served as assistant engineer in the construction of Hampton Roads defences from 1819–1824 and was in charge of fortifications and surveys in the Mississippi River delta area in 1824-1832. While superintendent of repair work on the Cumberland Road east of the Ohio River, he designed and built Dunlaps Creek Bridge in Brownsville, Pennsylvania, the first cast-iron tubular-arch bridge in the United States. Commissioned a major of engineers in July 1838, he was appointed superintendent of the Military Academy after the fire of 1838 and served till 1845. He designed the new buildings and the new cadet uniform that first displayed the castle insignia. He superintended the construction of coast defences for New York Harbor from 1846 to 1855.
In the beginning of 1855, Delafield was appointed by the Secretary of War, Jefferson Davis a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.
Delafield served as superintendent of the Military Academy again in 1856-1861. In January 1861, he was succeeded by Captain Pierre G. T. Beauregard, who was dismissed shortly after Beauregards home state of Louisiana seceded from the Union, and Delafield returned as superintendent serving until March 1, 1861. In the beginning of the Civil War he advised the governor of New York Edwin D. Morgan during the volunteer force creation. Then, in 1861–1864, he was put in charge of New York Harbor defences, including Governors Island and Fort at Sandy Hook. On May 19, 1864, he was commissioned a brigadier-general after replacing Joseph Gilbert Totten, who had died, as the Chief of Engineers, United States Army Corps of Engineers, on April 22, 1864. He stayed in charge of the Bureau of Engineers of the War Department until his retirement on August 8, 1866. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army of the United States, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866 and reconfirmed it due to a technicality on July 14, 1866.After retirement Delafield served as a regent of the Smithsonian Institution and a member of the Lighthouse Board. He died in Washington, D.C. on November 5, 1873.

• Title : Theory and Practice of the French Engineers....Quaters for Infantry..Plan of the Bob Proof Building for lodging 5 Companies presenting together an effective force of about 500 men.
• Date : 1856
• Condition: (A+) Fine Condition
• Ref:  90126
• Size: 26in x 20in (660mm x 500mm)

Description:
This large original lithograph print, schematics of barracks and quarters for infantry in France - during the time of the Crimean War and just prior to the American Civil War - was engraved by John T Bowen & co. of Philadelphia and was published in the 1856 edition of Captain Richard Delafields Report on the Art of War in Europe in 1854, 1855, and 1856.

In early 1855, Captain Richard Delafield was appointed by the Secretary of War, Jefferson Davis, a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.

General Definitions:
Paper thickness and quality: - Light and stable
Paper color : - off white
Age of map color: -
Colors used: -
General color appearance: -
Paper size: - 26in x 20in (660mm x 500mm)
Plate size: - 26in x 20in (660mm x 500mm)
Margins: - Min 1/2in (12mm)

Imperfections:
Margins: - None
Plate area: - Folds as issued
Verso: - Folds re-enforced with archival tape

Background:
The arrival of explosive shells in the 19th century led to yet another stage in the evolution of fortification. Star forts did not fare well against the effects of high explosive and the intricate arrangements of bastions, flanking batteries and the carefully constructed lines of fire for the defending cannon could be rapidly disrupted by explosive shells.
Worse, the large open ditches surrounding forts of this type were an integral part of the defensive scheme, as was the covered way at the edge of the counter scarp. The ditch was extremely vulnerable to bombardment with explosive shells.
In response, military engineers evolved the polygonal style of fortification. The ditch became deep and vertically sided, cut directly into the native rock or soil, laid out as a series of straight lines creating the central fortified area that gives this style of fortification its name.
Wide enough to be an impassable barrier for attacking troops, but narrow enough to be a difficult target for enemy shellfire, the ditch was swept by fire from defensive blockhouses set in the ditch as well as firing positions cut into the outer face of the ditch itself.
The profile of the fort became very low indeed, surrounded outside the ditch covered by caponiers by a gently sloping open area so as to eliminate possible cover for enemy forces, while the fort itself provided a minimal target for enemy fire. The entrypoint became a sunken gatehouse in the inner face of the ditch, reached by a curving ramp that gave access to the gate via a rolling bridge that could be withdrawn into the gatehouse.
Much of the fort moved underground. Deep passages and tunnels now connected the blockhouses and firing points in the ditch to the fort proper, with magazines and machine rooms deep under the surface. The guns, however, were often mounted in open emplacements and protected only by a parapet; both in order to keep a lower profile and also because experience with guns in closed casemates had seen them put out of action by rubble as their own casemates were collapsed around them.
Gone were citadels surrounding towns: forts were to be moved to the outside of the cities some 12 km to keep the enemy at a distance so their artillery could not bombard the city center. From now on a ring of forts were to be built at a spacing that would allow them to effectively cover the intervals between them.
The new forts abandoned the principle of the bastion, which had also been made obsolete by advances in arms. The outline was a much simplified polygon, surrounded by a ditch. These forts, built in masonry and shaped stone, were designed to shelter their garrison against bombardment. One organizing feature of the new system involved the construction of two defensive curtains: an outer line of forts, backed by an inner ring or line at critical points of terrain or junctions (see, for example, Séré de Rivières system in France).
Traditional fortification however continued to be applied by European armies engaged in warfare in colonies established in Africa against lightly armed attackers from amongst the indigenous population. A relatively small number of defenders in a fort impervious to primitive weaponry could hold out against high odds, the only constraint being the supply of ammunition.

Delafield, Richard Major General 1798 - 1873 - Delafield was a United States Army officer for 52 years. He served as superintendent of the United States Military Academy for 12 years. At the start of the American Civil War, then Colonel Delafield helped equip and send volunteers from New York to the Union Army. He also was in command of defences around New York harbor from 1861 to April 1864. On April 22, 1864, he was promoted to Brigadier General in the Regular Army of the United States and Chief of Engineers. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866, reconfirmed due to a technicality on July 14, 1866. He retired from the US Army on August 8, 1866. He later served on two commissions relating to improvements to Boston Harbor and to lighthouses. He also served as a regent of the Smithsonian Institution.
Delafield served as assistant engineer in the construction of Hampton Roads defences from 1819–1824 and was in charge of fortifications and surveys in the Mississippi River delta area in 1824-1832. While superintendent of repair work on the Cumberland Road east of the Ohio River, he designed and built Dunlaps Creek Bridge in Brownsville, Pennsylvania, the first cast-iron tubular-arch bridge in the United States. Commissioned a major of engineers in July 1838, he was appointed superintendent of the Military Academy after the fire of 1838 and served till 1845. He designed the new buildings and the new cadet uniform that first displayed the castle insignia. He superintended the construction of coast defences for New York Harbor from 1846 to 1855.
In the beginning of 1855, Delafield was appointed by the Secretary of War, Jefferson Davis a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.
Delafield served as superintendent of the Military Academy again in 1856-1861. In January 1861, he was succeeded by Captain Pierre G. T. Beauregard, who was dismissed shortly after Beauregards home state of Louisiana seceded from the Union, and Delafield returned as superintendent serving until March 1, 1861. In the beginning of the Civil War he advised the governor of New York Edwin D. Morgan during the volunteer force creation. Then, in 1861–1864, he was put in charge of New York Harbor defences, including Governors Island and Fort at Sandy Hook. On May 19, 1864, he was commissioned a brigadier-general after replacing Joseph Gilbert Totten, who had died, as the Chief of Engineers, United States Army Corps of Engineers, on April 22, 1864. He stayed in charge of the Bureau of Engineers of the War Department until his retirement on August 8, 1866. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army of the United States, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866 and reconfirmed it due to a technicality on July 14, 1866.After retirement Delafield served as a regent of the Smithsonian Institution and a member of the Lighthouse Board. He died in Washington, D.C. on November 5, 1873.

• Title : Cavalry Barracks - Furniture of the Company Quarters...
• Date : 1856
• Condition: (A+) Fine Condition
• Ref:  90133
• Size: 26in x 20in (660mm x 500mm)

Description:
This large original lithograph print, schematics of the internals of cavalry barracks and quarters (guns, boots, pistols etc) - during the time of the Crimean War and just prior to the American Civil War - was engraved by John T Bowen & co. of Philadelphia and was published in the 1856 edition of Captain Richard Delafields Report on the Art of War in Europe in 1854, 1855, and 1856.

In early 1855, Captain Richard Delafield was appointed by the Secretary of War, Jefferson Davis, a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.

General Definitions:
Paper thickness and quality: - Light and stable
Paper color : - off white
Age of map color: -
Colors used: -
General color appearance: -
Paper size: - 26in x 20in (660mm x 500mm)
Plate size: - 26in x 20in (660mm x 500mm)
Margins: - Min 1/2in (12mm)

Imperfections:
Margins: - None
Plate area: - Folds as issued
Verso: - Folds re-enforced with archival tape

Background:
The arrival of explosive shells in the 19th century led to yet another stage in the evolution of fortification. Star forts did not fare well against the effects of high explosive and the intricate arrangements of bastions, flanking batteries and the carefully constructed lines of fire for the defending cannon could be rapidly disrupted by explosive shells.
Worse, the large open ditches surrounding forts of this type were an integral part of the defensive scheme, as was the covered way at the edge of the counter scarp. The ditch was extremely vulnerable to bombardment with explosive shells.
In response, military engineers evolved the polygonal style of fortification. The ditch became deep and vertically sided, cut directly into the native rock or soil, laid out as a series of straight lines creating the central fortified area that gives this style of fortification its name.
Wide enough to be an impassable barrier for attacking troops, but narrow enough to be a difficult target for enemy shellfire, the ditch was swept by fire from defensive blockhouses set in the ditch as well as firing positions cut into the outer face of the ditch itself.
The profile of the fort became very low indeed, surrounded outside the ditch covered by caponiers by a gently sloping open area so as to eliminate possible cover for enemy forces, while the fort itself provided a minimal target for enemy fire. The entrypoint became a sunken gatehouse in the inner face of the ditch, reached by a curving ramp that gave access to the gate via a rolling bridge that could be withdrawn into the gatehouse.
Much of the fort moved underground. Deep passages and tunnels now connected the blockhouses and firing points in the ditch to the fort proper, with magazines and machine rooms deep under the surface. The guns, however, were often mounted in open emplacements and protected only by a parapet; both in order to keep a lower profile and also because experience with guns in closed casemates had seen them put out of action by rubble as their own casemates were collapsed around them.
Gone were citadels surrounding towns: forts were to be moved to the outside of the cities some 12 km to keep the enemy at a distance so their artillery could not bombard the city center. From now on a ring of forts were to be built at a spacing that would allow them to effectively cover the intervals between them.
The new forts abandoned the principle of the bastion, which had also been made obsolete by advances in arms. The outline was a much simplified polygon, surrounded by a ditch. These forts, built in masonry and shaped stone, were designed to shelter their garrison against bombardment. One organizing feature of the new system involved the construction of two defensive curtains: an outer line of forts, backed by an inner ring or line at critical points of terrain or junctions (see, for example, Séré de Rivières system in France).
Traditional fortification however continued to be applied by European armies engaged in warfare in colonies established in Africa against lightly armed attackers from amongst the indigenous population. A relatively small number of defenders in a fort impervious to primitive weaponry could hold out against high odds, the only constraint being the supply of ammunition.

Delafield, Richard Major General 1798 - 1873 - Delafield was a United States Army officer for 52 years. He served as superintendent of the United States Military Academy for 12 years. At the start of the American Civil War, then Colonel Delafield helped equip and send volunteers from New York to the Union Army. He also was in command of defences around New York harbor from 1861 to April 1864. On April 22, 1864, he was promoted to Brigadier General in the Regular Army of the United States and Chief of Engineers. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866, reconfirmed due to a technicality on July 14, 1866. He retired from the US Army on August 8, 1866. He later served on two commissions relating to improvements to Boston Harbor and to lighthouses. He also served as a regent of the Smithsonian Institution.
Delafield served as assistant engineer in the construction of Hampton Roads defences from 1819–1824 and was in charge of fortifications and surveys in the Mississippi River delta area in 1824-1832. While superintendent of repair work on the Cumberland Road east of the Ohio River, he designed and built Dunlaps Creek Bridge in Brownsville, Pennsylvania, the first cast-iron tubular-arch bridge in the United States. Commissioned a major of engineers in July 1838, he was appointed superintendent of the Military Academy after the fire of 1838 and served till 1845. He designed the new buildings and the new cadet uniform that first displayed the castle insignia. He superintended the construction of coast defences for New York Harbor from 1846 to 1855.
In the beginning of 1855, Delafield was appointed by the Secretary of War, Jefferson Davis a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.
Delafield served as superintendent of the Military Academy again in 1856-1861. In January 1861, he was succeeded by Captain Pierre G. T. Beauregard, who was dismissed shortly after Beauregards home state of Louisiana seceded from the Union, and Delafield returned as superintendent serving until March 1, 1861. In the beginning of the Civil War he advised the governor of New York Edwin D. Morgan during the volunteer force creation. Then, in 1861–1864, he was put in charge of New York Harbor defences, including Governors Island and Fort at Sandy Hook. On May 19, 1864, he was commissioned a brigadier-general after replacing Joseph Gilbert Totten, who had died, as the Chief of Engineers, United States Army Corps of Engineers, on April 22, 1864. He stayed in charge of the Bureau of Engineers of the War Department until his retirement on August 8, 1866. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army of the United States, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866 and reconfirmed it due to a technicality on July 14, 1866.After retirement Delafield served as a regent of the Smithsonian Institution and a member of the Lighthouse Board. He died in Washington, D.C. on November 5, 1873.

• Title : French Barracks for Cavalry - Details relative to the Stables
• Date : 1856
• Condition: (A) Very Good Condition
• Ref:  90125
• Size: 26in x 20in (660mm x 500mm)

Description:
This large original lithograph print, internal schematics of the French Cavalry Barracks & Stables - during the time of the Crimean War and just prior to the American Civil War - was engraved by John T Bowen & co. of Philadelphia and was published in the 1856 edition of Captain Richard Delafields Report on the Art of War in Europe in 1854, 1855, and 1856.

In early 1855, Captain Richard Delafield was appointed by the Secretary of War, Jefferson Davis, a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.

General Definitions:
Paper thickness and quality: - Light and stable
Paper color : - off white
Age of map color: -
Colors used: -
General color appearance: -
Paper size: - 26in x 20in (660mm x 500mm)
Plate size: - 26in x 20in (660mm x 500mm)
Margins: - Min 1/2in (12mm)

Imperfections:
Margins: - None
Plate area: - Light age toning along folds as issued
Verso: - Folds re-enforced with archival tape

Background:
The arrival of explosive shells in the 19th century led to yet another stage in the evolution of fortification. Star forts did not fare well against the effects of high explosive and the intricate arrangements of bastions, flanking batteries and the carefully constructed lines of fire for the defending cannon could be rapidly disrupted by explosive shells.
Worse, the large open ditches surrounding forts of this type were an integral part of the defensive scheme, as was the covered way at the edge of the counter scarp. The ditch was extremely vulnerable to bombardment with explosive shells.
In response, military engineers evolved the polygonal style of fortification. The ditch became deep and vertically sided, cut directly into the native rock or soil, laid out as a series of straight lines creating the central fortified area that gives this style of fortification its name.
Wide enough to be an impassable barrier for attacking troops, but narrow enough to be a difficult target for enemy shellfire, the ditch was swept by fire from defensive blockhouses set in the ditch as well as firing positions cut into the outer face of the ditch itself.
The profile of the fort became very low indeed, surrounded outside the ditch covered by caponiers by a gently sloping open area so as to eliminate possible cover for enemy forces, while the fort itself provided a minimal target for enemy fire. The entrypoint became a sunken gatehouse in the inner face of the ditch, reached by a curving ramp that gave access to the gate via a rolling bridge that could be withdrawn into the gatehouse.
Much of the fort moved underground. Deep passages and tunnels now connected the blockhouses and firing points in the ditch to the fort proper, with magazines and machine rooms deep under the surface. The guns, however, were often mounted in open emplacements and protected only by a parapet; both in order to keep a lower profile and also because experience with guns in closed casemates had seen them put out of action by rubble as their own casemates were collapsed around them.
Gone were citadels surrounding towns: forts were to be moved to the outside of the cities some 12 km to keep the enemy at a distance so their artillery could not bombard the city center. From now on a ring of forts were to be built at a spacing that would allow them to effectively cover the intervals between them.
The new forts abandoned the principle of the bastion, which had also been made obsolete by advances in arms. The outline was a much simplified polygon, surrounded by a ditch. These forts, built in masonry and shaped stone, were designed to shelter their garrison against bombardment. One organizing feature of the new system involved the construction of two defensive curtains: an outer line of forts, backed by an inner ring or line at critical points of terrain or junctions (see, for example, Séré de Rivières system in France).
Traditional fortification however continued to be applied by European armies engaged in warfare in colonies established in Africa against lightly armed attackers from amongst the indigenous population. A relatively small number of defenders in a fort impervious to primitive weaponry could hold out against high odds, the only constraint being the supply of ammunition.

Delafield, Richard Major General 1798 - 1873 - Delafield was a United States Army officer for 52 years. He served as superintendent of the United States Military Academy for 12 years. At the start of the American Civil War, then Colonel Delafield helped equip and send volunteers from New York to the Union Army. He also was in command of defences around New York harbor from 1861 to April 1864. On April 22, 1864, he was promoted to Brigadier General in the Regular Army of the United States and Chief of Engineers. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866, reconfirmed due to a technicality on July 14, 1866. He retired from the US Army on August 8, 1866. He later served on two commissions relating to improvements to Boston Harbor and to lighthouses. He also served as a regent of the Smithsonian Institution.
Delafield served as assistant engineer in the construction of Hampton Roads defences from 1819–1824 and was in charge of fortifications and surveys in the Mississippi River delta area in 1824-1832. While superintendent of repair work on the Cumberland Road east of the Ohio River, he designed and built Dunlaps Creek Bridge in Brownsville, Pennsylvania, the first cast-iron tubular-arch bridge in the United States. Commissioned a major of engineers in July 1838, he was appointed superintendent of the Military Academy after the fire of 1838 and served till 1845. He designed the new buildings and the new cadet uniform that first displayed the castle insignia. He superintended the construction of coast defences for New York Harbor from 1846 to 1855.
In the beginning of 1855, Delafield was appointed by the Secretary of War, Jefferson Davis a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.
Delafield served as superintendent of the Military Academy again in 1856-1861. In January 1861, he was succeeded by Captain Pierre G. T. Beauregard, who was dismissed shortly after Beauregards home state of Louisiana seceded from the Union, and Delafield returned as superintendent serving until March 1, 1861. In the beginning of the Civil War he advised the governor of New York Edwin D. Morgan during the volunteer force creation. Then, in 1861–1864, he was put in charge of New York Harbor defences, including Governors Island and Fort at Sandy Hook. On May 19, 1864, he was commissioned a brigadier-general after replacing Joseph Gilbert Totten, who had died, as the Chief of Engineers, United States Army Corps of Engineers, on April 22, 1864. He stayed in charge of the Bureau of Engineers of the War Department until his retirement on August 8, 1866. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army of the United States, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866 and reconfirmed it due to a technicality on July 14, 1866.After retirement Delafield served as a regent of the Smithsonian Institution and a member of the Lighthouse Board. He died in Washington, D.C. on November 5, 1873.

• Title : Detached Forts about the City of Lyons
• Date : 1856
• Condition: (A) Very Good Condition
• Ref:  90193
• Size: 29in x 20in (735mm x 515mm)

This large original lithograph print, schematics of the forts or Belts of Lyon, France - during the time of the Crimean War and just prior to the American Civil War - was engraved by John T Bowen & co. of Philadelphia and was published in the 1856 edition of Captain Richard Delafields Report on the Art of War in Europe in 1854, 1855, and 1856.

In early 1855, Captain Richard Delafield was appointed by the Secretary of War, Jefferson Davis, a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.

General Definitions:
Paper thickness and quality: - Light and stable
Paper color : - off white
Age of map color: -
Colors used: -
General color appearance: -
Paper size: - 29in x 20in (735mm x 515mm)
Plate size: - 29in x 20in (735mm x 515mm)
Margins: - Min 1/2in (12mm)

Imperfections:
Margins: - None
Plate area: - Folds as issued
Verso: - Folds re-enforced with archival tape

Background:
The ceintures de Lyon (Belts of Lyon) were a series of fortifications built between 1830 and 1890 around the city of Lyon, France to protect the city from foreign invasion.
The belts comprised two defensive barriers that included forts, lunettes, ramparts, batteries, and other defensive structures. Many of these structures proved to be ineffective in war due to advancement in weapon technology and the evolution of attack strategies at the time. Some of the fortifications of the ceintures de Lyon have been destroyed, though many remain today.
In 1830 the maréchal de camp, Hubert Rohault de Fleury, commenced a project designed by military engineer Baron Haxo. With a budget of 10,000,000 francs (approximately €67,000,000 as of 2015) allocated for Lyon between 1831 and 1839, this first project included the restoration of the fortifications between Croix Rousse and Fourvière; the construction of two forts on the plateau of Caluire (Fort de Montessuy and Fort de Caluire, connected by the Enceinte de Caluire), facing the Dombes; closing access to the Presquîle by the construction of a south-facing building; building two forts – Fort de la Duchère and Fort de Grange Blanche – to protect access routes towards Paris and Auvergne.
The fortification of the city is divided into three sectors: The north was protected by the wall of Croix-Rousse and the structures between the Rhône and the Saône. The command was situated at fort de Montessuy. The west was covered by the hillfort of Fourvière and the associated forts of Vaise at Sainte-Foy. The command was situated at fort Saint-Irénée. The east was defended by the Redoute du Haut-Rhône and Fort de la Vitriolerie on the left bank of the Rhône. The command was situated at Fort Lamothe.
The work required almost 20,000 workers, which were locally sourced in an attempt to avoid insurrection such as the ongoing unrest of the Lyon silk workers (Canuts) over increased capitalism. Work began in 1831 to build seven structures, each structure requiring between 400 and 500 workers. The scope of this project included the construction of Fort de Montessuy and Fort de Caluire to the north; Fort des Brotteaux, Fort Montluc and Fort du Colombier to the east; the Redoute de la Part-Dieu to the west; and Fort Saint-Irénée, to protect the entire area.
In January 1831, an uprising began at a work site in Charpennes, however it was quickly stopped by the army. Other insurrections took place the same year, a series of Canut revolts, which succeeded in rallying soldiers on the side of the Canuts, resulting in the death of captain Viquesnel, aide-de-camp of Fleury, and the temporary withdrawal of the 20,000 soldiers who eventually retook the city in December 1831.
In 1832, three other structures were built to reinforce the defenses to the east: The Redoute de la Tête dor, Fort La Motte, and the Redoute des Hirondelles. A treaty was signed between the city of Lyon and the War Department, which stipulated that the city had to cede the land necessary for the construction of military buildings to the War Department, while the forts themselves would still belong to the city if the military decided to abandon them. It is thanks to this treaty that the forts of Croix Rousse, Fourvière, Loyasse, Vaise, and Saint-Jean would later be returned to the city.
Construction resumed in 1840. First the Fort de la Vitriolerie in 1840, then Fort de Sainte-Foy-lès-Lyon and the Lunette des Charpennes in 1842, Fort de la Duchère in 1844, the Redoute du Petit Sainte-Foy-lès-Lyon in 1852, and finally the Redoute du haut-Rhône in 1854.
A law was voted in on 10 July 1851, which defined the methods of destruction of these buildings or construction on their land. By 1854, 19 structures including 10 forts had been built around Lyon, creating a nearly 14-kilometre (8.7 mi) fortified perimeter.

Delafield, Richard Major General 1798 - 1873
Delafield was a United States Army officer for 52 years. He served as superintendent of the United States Military Academy for 12 years. At the start of the American Civil War, then Colonel Delafield helped equip and send volunteers from New York to the Union Army. He also was in command of defences around New York harbor from 1861 to April 1864. On April 22, 1864, he was promoted to Brigadier General in the Regular Army of the United States and Chief of Engineers. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866, reconfirmed due to a technicality on July 14, 1866. He retired from the US Army on August 8, 1866. He later served on two commissions relating to improvements to Boston Harbor and to lighthouses. He also served as a regent of the Smithsonian Institution.
Delafield served as assistant engineer in the construction of Hampton Roads defences from 1819–1824 and was in charge of fortifications and surveys in the Mississippi River delta area in 1824-1832. While superintendent of repair work on the Cumberland Road east of the Ohio River, he designed and built Dunlaps Creek Bridge in Brownsville, Pennsylvania, the first cast-iron tubular-arch bridge in the United States. Commissioned a major of engineers in July 1838, he was appointed superintendent of the Military Academy after the fire of 1838 and served till 1845. He designed the new buildings and the new cadet uniform that first displayed the castle insignia. He superintended the construction of coast defences for New York Harbor from 1846 to 1855.
In the beginning of 1855, Delafield was appointed by the Secretary of War, Jefferson Davis a head of the board of officers, later called The Delafield Commission, and sent to Europe to study the European military. The board included Captain George B. McClellan and Major Alfred Mordecai. They inspected the state of the military in Great Britain, Germany, the Austrian Empire, France, Belgium, and Russia, and served as military observers during the Crimean War. After his return in April 1856, Delafield submitted a report which was later published as a book by Congress, Report on the Art of War in Europe in 1854, 1855, and 1856. The book was suppressed during the American Civil War due to fears that it would be instructive to Confederate engineers as it contained multiple drawings and descriptions of military fortifications.
Delafield served as superintendent of the Military Academy again in 1856-1861. In January 1861, he was succeeded by Captain Pierre G. T. Beauregard, who was dismissed shortly after Beauregards home state of Louisiana seceded from the Union, and Delafield returned as superintendent serving until March 1, 1861. In the beginning of the Civil War he advised the governor of New York Edwin D. Morgan during the volunteer force creation. Then, in 1861–1864, he was put in charge of New York Harbor defences, including Governors Island and Fort at Sandy Hook. On May 19, 1864, he was commissioned a brigadier-general after replacing Joseph Gilbert Totten, who had died, as the Chief of Engineers, United States Army Corps of Engineers, on April 22, 1864. He stayed in charge of the Bureau of Engineers of the War Department until his retirement on August 8, 1866. On March 8, 1866, President Andrew Johnson nominated Delafield for appointment to the grade of brevet major general in the Regular Army of the United States, to rank from March 13, 1865, and the United States Senate confirmed the appointment on May 4, 1866 and reconfirmed it due to a technicality on July 14, 1866.After retirement Delafield served as a regent of the Smithsonian Institution and a member of the Lighthouse Board. He died in Washington, D.C. on November 5, 1873.