The great river itself is known in Tibet by many names, being generally called the Nari Chu, Maghang Tsanpo or Yaro Tsanpo, above Lhasa; the word " tsanpo " (tsang-po) meaning (according to Waddell) the " pure one," and applying to all great rivers.
Tsang and Nari are under the rule of Lhasa, all the high civil and military authorities in these provinces holding their offices from it.
The part of Tibet under the rule of Lhasa, by far the largest and wealthiest, includes the central province of V, Tsang, Nari and a number of large outlying districts in southern and even in eastern Tibet.
The latter went to Nari (Mngari) and founded the .capital Purang; he left three sons, of whom the eldest declared himself king of Mang-yul, the second seized Purang, and the youngest, Detsud-gan, became king of the province of Shang-shung (the modern Gughe).
To the Peshin valley the distance is about fro m., and from Peshin to India the three principal routes measure approximately as follows: by the Zhob valley to Dera Ismail Khan, 300 m.; by the Bori valley to Dera Ghazi Khan, 275 m.; by Quetta and the Bolan to Dadar, 125 m.; and by Chappar and Nari to Sibi, 120 m.