In it, the work mentions the environment, fantastical origin of the Tibetans (through the Himyarites), the divinity of the king, major resources (like musk) and a description of the trade routes to and from Tibet. Another source, Hudud al-'Alam (The Regions of the World) written by an unknown author in 982 or 983 in Afghanistan, contains mainly geography, politics and brief descriptions of Tibetan regions, cities, towns and other localities. This source has the first direct mention of the presence of Muslims in Tibet by stating that Lhasa had one mosque and a small Muslim population.[1]