Yarkand

Goez, who travelled to Tibet in 1602, in describing Yarkand, the capital of the kingdom of Kasgar, in Little Bucharia, mentions, that a commodity, particularly acceptable in China, was a kind of marble or jasper, found in Kasgar*.

1800, John Pinkerton, Petralogy, volume I, White, Cochrane, and Co., page 280

Where was the band heading? Not for India—probably for Yarkand; possibly for some place still farther east. It was therefore necessary for Captain Blacker to turn south-east up the Raskam River, and plunge into the wild tangle of the Karakoram mountains.

1923, John Buchan, “On the Roof of the World”, in A Book of Escapes and Hurried Journeys, Houghton Mifflin Company, →OCLC, page 297

Posgām (in Arabic letters written Būskām) is a large town to the southeast of Yārkand, situated on the trade route coming from Karġalik (today: Yeh-ch‘eng) at a distance of 21 miles from Karġalik. Posgām is the modern Tse-p‘u.

[1986, Monika Gronke, “The Arabic Yārkand Documents”, in Bulletin of the School of Oriental and African Studies, volume XLIX, number 3, School of Oriental and African Studies, →ISSN, →OCLC, page 491