206 Memorandum on the Nanga Parbat. [No. 4. 



Leh or Ladakh, through the valley of the Shai Yak, as the northern 

 branch of the Indus is named, and over the Karah Korrura moun- 

 tains, which appears to have been the route followed by the Sayed. 

 There is another route from Leh to the Karah Korrum range, fur- 

 ther to the west by way of N libra, but it is only used when the 

 Shai Yak is too deep to be crossed. The route by Iskardoh is less 

 than the other by ten stages, but it is only open from the middle 

 of April to the end of October, whilst the Leh route is practicable, 

 though difficult, for the greater part of the year. 

 MulMn, 10th April, 1857. 



Memorandum on the Nanga JParbat and other Snowy Mountains of 

 the Himalaya Range adjacent to Kashmir. — By T. G. Montgo- 

 mery, Lt. Engineers, 1st Asst. Gt. Trig. Survey of India, in 

 charge Kashmir Series. 



Colonel Waugh having given me permission to publish the approx- 

 imate heights and positions of the Nanga Parbat and other snowy 

 mountains fixed by the Kashmir series, I have the pleasure to 

 put at the disposal of the Asiatic Society a memorandum of the 

 same with tables, &c. shewing how the height of the Nanga Parbat 

 has been obtained. 



The mean height of 26,629 feet for the Nanga Parbat is approxi- 

 mate, but is not likely to alter materially when all the refinements 

 of computation have been applied. 



The height of the stations of the Kashmir series depend upon 

 the N. "W. Himalaya series, and as yet the N. W. H. series 

 depends upon the height of the Bauog observatory, which Colonel 

 "Waugh has already tested by trigonometrical levelling from sea to 

 sea* over 2,127 miles of hill and plain — a test that has never before 

 been applied or at any rate successfully carried out on such a 

 gigantic scale. 



The N. W. H. series thus starting with a verified height has not 

 as yet been tested by a process similar to the above. Before long, 

 however, Colonel Waugh's great geodetical quadrilateral that 

 * From Calcutta to Bombay and Kurrachee. 



