John Biddulph in his book Tribes of Hindoo Koosh , has given a detailed account of his adventure in Yarkand and Gilgit during the early 18th century. According to the author, the population that is settled in Gilgit during his time of visit is majorly a mixed population with the descent of Hindu as he says that "the former rulers had a title of Ra, and there is reason to suppose that they were at one time Hindoos, but for the last five centuries and a half they been Mahommedan”. In Wakhan, Sirikol, and Yarkand, the name Kunjoot is given to Hunza and in ancient times it was called Challaj Bultum, a name which has fallen into disuse. John Biddulph talks about Hunza as the “chief place of resort for slave-merchants from Badakhshan”. The men were seized from caravans while they plundered them in Yarkand. One of the most successful adventures took place in 1865 when no less than 50 camels and 500 ponies laden with merchandise were driven from Koolanooldi to Hunza by way of Ujadbai without opposition.