But the natural direction for the enlargement of the city would be the southern slope of the hill towards the river; and at some period—perhaps in the third or fourth century—the eastern and western walls were prolonged until they met a transverse wall, 50 yards from the river, at about the centre of which is the mediæval gate called the “Stone-bow.” Leaving the south-east corner of the original wall at the Cantilupe Chantry, the prolonged east wall descended the hill between the Vicar’s Court and the Bishop’s Palace (where part of it still exists), through the Temple Gardens, with the “Were Dyke” as its fosse, to the junction of Silver Street and Broadgate, where was a gateway, called Clasket Gate. Thence it was continued to a bastion, once called the Tower Garth, on the south side of St. Swithin’s Square. From this point the southern wall, which was lately uncovered in several places, extended to the “Stone-bow” and along Guildhall Street and Newland to its south-west corner at the (so-called) “Lucy” Tower, whence it ascended Motherby Hill to the western end of the original south wall at the corner of the Castle. This later town would be nearly double the size of the original colony, and the whole twin-city must have covered an area as large as that of Roman Colchester (108 acres). The walling of the lower city points to a sense of insecurity, but whether this arose from native disaffection or from a fear of foreign invasion there is no evidence to show. It probably contained no official buildings, and few important remains have come to light within it, but a hypocaust was found in 1782 near the top of High Street. Space would fail us in enumerating the many lesser articles of interest discovered in Lincoln. Seven tessellated pavements have been found, all in the upper city; a perfect Roman altar, with inscription, came to light in 1884 on the site of St. Swithin’s Tower; and at least six sepulchral slabs have been unearthed, three of which were in memory of soldiers of the Ninth (Spanish) Legion—perhaps an indication that to this legion, which is not mentioned after Trajan’s reign, lands were assigned at the foundation of the colony. Traces of interments have been found bordering the roads on the north, east, and south of the city; those beyond the east gate seem to be the most numerous, and in one case the remains were enclosed in a large burial-chamber. In the immediate neighbourhood of the city were villas of some size. At Canwick Church there is a tessellated pavement, two feet below the floor-level, extending the whole length of the nave; and at Greetwell, a mile and a half to the east, a substantial residence was discovered, with many rooms and corridors, and with pavements of artistic design.