 Ancillary buildings were sited on further terraces above and beyond the Canteen (ranged along the left-hand side of the flight of steps); further buildings were added in the 1860s, including additional married quarters.Barrack accommodation on Western Heights was further increased by the building of another barracks to the south-west, South Front Barracks, in the 1860s.In contrast to the Grand Shaft Barracks, which had come to be seen as vulnerable due to technological advances in artillery, the accommodation at South Front Barracks was mainly built within bomb-proof casemates within the ditch of the southern defensive line (which was constructed at the same time above Archcliffe Fort).