eastern ditch continued in front of the gateway, albeit in a narrowed form, and must have been crossed by a bridge. The reason may be drainage, for it lies close to the River Olway, no doubt then as today liable to flooding, as was demonstrated by the dramatic photo in CA 10 showing the mechanical excavator marooned by a sudden summer flood. Indeed such floods may well be the reason for the fort's eventual abandonment.
The work of 1968-71 behind the County Gaol was dominated by the discovery of two groups of granaries, each of a very different type. The main group of three lay immediately inside the eastern gate adjacent to the via principalis. These were designed to have a length of 120 Roman feet and a width of 40 Roman feet, so that the three of them formed a square of 120 ft. in each direction, or 1 Roman actus. The foundations consisted of rows of posts spaced at intervals of 5 Roman feet and set in deep trenches. The posts had a circular cross section, unlike the structural timbers of all other buildings found, confirming that they were only intended to form a substructure. Surprisingly the loading bays were at the western end. Each granary had three postholes set in front of it, probably to allow the main roof to be carried forward to form a deep bay over the loading platforms, which were fronted by an area of heavy cobbling.
The plan of the second group of granaries was strikingly different. The remains consisted of 10 grids of posts at 5 ft. intervals, which can be interpreted either as 10 small granaries or as 5 larger ones with a central loading bay over which the roof is continued. Instead of being set in pits or trenches the posts were pointed and had been driven into the ground. The task of driving 420 posts, each 15 cm. in diameter, almost three quarters of a metre into the clay can have been no light one, and would almost certainly have been done with a pile