OF THE RIVER SETLEJ. 411 



ever seen or read of, had a j lister title to confidence than this one; I mean 

 judging from its previous performance. 



7. A few particulars more remain to be noted, on Lapcha Pa?s, the bear- 

 ing of Purkyul Peak was observed 130°54'Cor. for declination 133° 49'. 

 The protracted latitude of the Pass (from Skalkar) was 32° 02' 5G" from 

 these data we obtain the longitude of the Pass 78° 32' 07". Some mistake 

 committed in observing or recording the angle of altitude prevents its be- 

 ing used. But from the Snowy Peak Rishi Gangtang (fixed by protraction) 

 and having an elevation of 21,229 feet, as observed from Tashigang, the 

 elevation of this pass would appear to be 13,468 feet. The angle of altitude 

 was 2° 39' 50" feet. This result is in some measure confirmed by the angle 

 of altitude of the Pass observed at Skalkar combined with the protracted 

 distance and elevation of that place. 



8. In the Survey of the Route an excellent Theodolite was used for the 

 bearings, distant points being freely used as cheeks on the protraction. The 

 distances were determined by Time. Such a method will be thought per- 

 haps loose and inaccurate and so no doubt it is ; but when it is borne in 

 mind that such is the rugged nature of these roads that in whatever manner 



3 1_ 



the measure be taken, it will require to be reduced from o to fo before it can 

 be used for protraction, and that this reduction must depend entirely on es- 

 timation, there will appear little cause for preferring (except on the score 

 of convenience, any of the three methods which I have been in the habit of 

 employing during my labors in these mountains, viz. Perambulator Mea- 

 surement, Pacing, or Time. I may also add that 1 had well exercised 

 myself in the number of paces which may be taken within the minute, on 

 ..every quality of path, and that this number was always inserted in the tield 

 book at the time, as was likewise the reduction of the road line to the 

 straight one for protraction. 



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