Each quadrangle contained four wooden two-storied barracks, or caserns, 100 feet long and 22 feet wide, roofed with red tiles, the shallowness of their depth from back to front adding to their apparent height. The sixteen buildings faced the east, eight with their outer ends to the south fence, and eight with their outer end to the north fence. The four caserns in each square were placed one behind the other, leaving between each block and the next in front a space which was strongly fenced off at either end, forming an enclosure about 100 by 70 feet, in which the prisoners of each casern were confined when the gates opening into the quadrangle, or airing-ground, were locked at sunset. Each casern was constructed to form the dwelling-place of about 500 prisoners, who slept in rows of hammocks, closely packed in tiers one above the other. It is almost certain that each of the two floors in these caserns was divided by partitions into three chambers, as at the sale each of the sixteen was sold in three lots—the north end, the centre, and the south end. The north end of the hinder block in the north-east quadrangle was bought on the 25th September 1816 by Mr. Dan Ruddle for £32. {23a} He re-erected it for workshops in his building-yard, where it still stands, and it is thus possible to-day, to look upon the north end of the casern (No. 13, or letter M), which stood behind the three blocks adapted for the prisoners’ hospital, and which in the second period of the war {23b} was occupied by the French petty officers and by civilians who were captured, and whose position did not entitle them to parole. In the south-east quadrangle, which was on the right of the central south entrance to the prison from the Peterborough Road, there were, in addition to these four caserns and their necessary offices, the superintendent’s, or agent’s offices, a storehouse, a room set apart for the clerks and other officials, a cooking-house, and, as in each of the other quadrangles, two turnkeys’ lodges. These smaller buildings in each quadrangle were in a court, cut off from the large space which formed the prisoners’ airing-ground by stockade fencing similar to that surrounding the whole quadrangle, the turnkeys’ lodges being immediately behind this fence. The only exit from the part of the quadrangle occupied by the prisoners was through this court, the gate situated in the inner stockade fence being between the two turnkeys’ lodges, facing another in the main fence of the square, which opened into the road between the quadrangles. There were in each quadrangle three wells, two in the airing-courts near the caserns, and one in the enclosed space in which were the accessory buildings.