Ruins of Desert Cathay 171 - Guard-room built against north-east corner of ancient watch-tower T. viii, Tun-huang limes, after excavation. On left is seen the narrow gate leading into the quareters of the watch-station, with sockets to hold bars of door; on adjoiningwall surface therough outline sketch of a camel; on extreme right stepsofstairs once leading to roof of quarters and thence to top of tower. - Few of the towers had such a well preserved guard room. But most had extensive refuse dumps from which Stein extracted a great volume of documents and artifacts.