The wall of London is demonstrably later than the town, old material being found built into it. So is that of Silchester.
York was not three miles in circumference, Uriconium the same, Cirencester and Lincoln about two, Silchester and Bath somewhat smaller.
Roman milestones have been found in various places, amongst the latest and most interesting being one of Carausius discovered in 1895, at Carlisle. It had been reversed to substitute the name of Constantius (see p. 222.). It may be noted that the earliest of post-Roman date are those still existing on the road between Cambridge and London, set up in 1729.