The Sino-Indian conversations that followed the border clashes of late 1959 were undertaken partly for the purpose of examining in detail the historical evidence with which both sides supported their border claims. It is always difficult, however, to use historical evidence to bolster claims to areas which have for centuries been removed from the main stream of human existence. The Aksai Chin, in the extreme north-east of Ladakh, upon which much of the negotiations centred, is such a region; a bleak uninhabited highland which in the past was visited only by the inhabitants of adjacent territories in quest of salt and by occasional hunters. In 1717, however, the Aksai Chin was traversed by the Tsungar invaders of Tibet and 233 years later it was used for the same purpose by the Chinese. The success of this second venture led to the construction of a major road link between Sinkiang and Tibet, the existence of which precipitated the hostilities of 1959 and the discussions of 1960.