Detail of map 23 in Innermostasia - this is the northern side of this map sheet - this shows a large area between the foothill of the Kun lun and the Taklamakan - on the south is Lal Singh's survey route through Bostan and east toward Charchan and Tun-huang - on the north is Stein's route along the edge of the desert from Endere toward Charchan - Only the Charchan river manages to reach the desert and then turn east