MILITARY ARCHITECTURE. 157 over the glacis, or force their way in through the gate from the winding path. The gateway faced north, and was covered by an outer work on a lower level, a few yards in front. It formed a round tower (i in plan), having in its rear a sentry-box, likewise ' - ,.>" T .^:' ' - ' ' FlG. 113. Pishmish Kaleh. Plan. Explor. ArchL, Plate VIII. rock-hewn, in which soldiers on guard were posted. Built walls only occur where the rock was not thick or salient enough to allow of a rampart being reserved in the mass, as for instance at the south-east angle. Here the lower courses of the artificial wall consist of large blocks almost everywhere regularly fixed, but with irregular joints a style of masonry which recalls that of the
