Sentence:  To the South we observed a large plain some ten miles wide, with snowy <WSD>peaks</WSD> rising on the farther side. In front was a hill projecting into the plain, on which stood a mani wall; and this latter discovery made me feel quite confident that I was on the high road to Lhassa. 
Meaning of the word marked with <WSD> tags:  The whole hill or mountain, especially when isolated.