Ruins of Desert Cathay 162 - Ruined watch-tower T. xxv. north of Tun-hunag oasis, seen from south-west - Chiang-ssu-yeh at foot of tower (he was Stein's Chinese secretary seconded from the Indian mission at Kashgar) - This is one of the best preserved of the Han Dynasty towers - note the remaining walls of the watch station on top, rarely preserved.