Start for Karakoram-Steep ascent out of Nubra valley-Meet a party of Merchants from Yarkand-View from summit of pass-Rapid torrent-Large glacier-Steep moraines-Alpine vegetation-Numerous glaciers-Lakes-Glacier on crest of Sassar pass-Sassar-Cross Shayuk river-Murgai-Limestone rocks-Ascend Murgai Valley to 16,800 feet-Singular limestone formation-Op