Towards the close of the 19th century several explorers gave attention to this question.
It induced many Spanish explorers to lead expeditions in search of treasure, but all failed.
The Northmen of Denmark and Norway, whose piratical adventures were the terror of all the coasts of Europe, and who established themselves in Great Britain and Ireland, in France and The Sicily, were also geographical explorers in their rough but Nothmen.
One of their most distinguished explorers was Samuel Champlain, a captain in the navy, French North who, after a remarkable journey through Mexico and the America.
Both these explorers visited Lhasa.