Norman Cross Prison in Huntingdonshire, England, was the world's first purpose-built prisoner-of-war camp or "depot", built in 1796–97 to hold prisoners of war from France and its allies during the French Revolutionary Wars and Napoleonic Wars. After the Treaty of Amiens the depot was emptied of prisoners and, in 1816, largely demolished. Norman Cross lies south of Peterborough, Cambridgeshire, between the villages of Folksworth, Stilton and Yaxley. The junction of the A1 and A15 roads is here. Traditionally in Huntingdonshire, Norman Cross gave its name to one of the hundreds of Huntingdonshire and, from 1894 to 1974, to Norman Cross Rural District. Design and construction of prison camp The Royal Navy Transport Board was responsible for the care of prisoners of war. When Sir Ralph Abercromby communicated in 1796 that he was transferring 4,000 prisoners from the West Indies, the Board began the search for a site for a new prison. The site was chosen because it was on the Great North Road only north of London and was deemed far enough from the coast that escaped prisoners could not easily flee back to France. The site had a good water supply and close to sufficient local sources of food to sustain many thousands of prisoners and the guards. Work commenced in December 1796 with much of the timber building prefabricated in London and assembled on site. 500 carpenters and labourers worked on the site for 3 months. The cost of construction was £34,581 11s 3d. The design of the prison was based on that of a contemporary artillery fort. A ditch wide and about 5 feet deep (to prevent prisoners tunnelling out) was placed inside the wall (originally a wooden stockade fence, replaced with a brick wall in 1805) and guarded by 'silent sentries' who could not be seen by the prisoners. The barracks for the garrison were placed outside and a large guard house (known as the Block House) containing troops and six cannon was placed right at the centre. The interior of the prison was divided into four quadrangles, each with four double-storey wooden accommodation blocks for 500 prisoners and four ablutions blocks. One accommodation block was reserved for officers. Half of each quadrangle was a large exercise yard. The north-east quadrangle contained the prison hospital. There was also a windowless block known as the Black Hole in which prisoners were kept shackled on half rations as