A detailed study of the masonry defences of one of England's most important Roman sites. Erected in c. 270 AD, the masonry walls of the Roman town of Silchester (Calleva Atrebatum; Hampshire, S. England) are part of the third system in a series of defensive works. They stand today to a height of almost 5m and are composed of up to seven lifts or stages, each consisting of a flint core and facing (now almost completely robbed away), capped by a string-course of large blocks and slabs that stretches across the full width (c. 3m) of the walls, formed of a wide variety of rock-types foreign to...

The five-hundred year occupation of Insula IX at Silchester has yielded a sequence of 87 whetstones, mostly tabular but some bar- or rod-shaped. These are described, illustrated and characterized with the help of thin-section microscopic petrography. The whetstones originated in many geological sources, not all of which can at present be identified. Whetstones from the earliest levels at Silchester are comparatively local in origin (sarsen, ironstone) or were made from discarded, imported milling stones(Quartz Conglomerate, Upper Old Red Sandstone). During the first and second centuries AD...