During the following days we encamped in a country where the grazing was good but the water slightly salt. On the wide, flat plains on the west side of the lake stand long rows of cairns, heaps of earth or skulls, piled up at a distance of two or three yards apart. They look like boundary marks, but, in fact, have been erected by antelope hunters of the Changpa tribe, Tibetan nomads, who are the “Northmen,” or natives of the northern plateau, Chang-tang, and who in this way drive the game into their nooses laid in a hole. It should be explained that antelopes have a decided objection to leaping over such lines, and will rather run along them till they come to the end. But before they reach it one of them has had the misfortune of putting his foot in a ditch with a noose in it. Only a son of the wilderness, who passes his life in the open like the wild animals, could devise such a mode of capture. My Ladakis informed me that the Changpas no longer hunt here, for fear of the people of Eastern Turkestan, who have often shown themselves hostile.
The 24th of September was another memorable day—my sails on Tibetan lakes, curiously enough, almost always ended in adventures. Of my Ladakis five had been in the service of Deasy and Rawling, and two of them affirmed that a shiny spot east-south-east was the spring where Captain Deasy had encamped for ten days in July 1896, and which he names in his narrative “Fever Camp.” Their indication agreed with Deasy’s map; so Muhamed Isa was ordered to lead the caravan thither, light a large beacon fire on the nearest point of the shore as soon as darkness set in, and keep two horses in readiness.
Our plan was to sail in an east-north-easterly direction for the northern shore, and thence southwards again to the signal fire. Rehim Ali was on this occasion assisted by Robert, who subsequently developed into an excellent boatman. The lake was nearly quite calm; its water, owing to its small depth, is greener, but quite as clear as that of its western neighbour. It is so salt that everything that touches it, hands, boat, oars, etc., glitters with crystals of salt. The shore and bottom of the lake consist chiefly of clay cemented together by crystallized salt into slabs and blocks as hard as stone, so that great care must be exercised when the boat is pushed into the water, for these slabs have edges and corners as sharp as knives. The lake is a salt basin of approximately elliptical outline with very low banks; nowhere do mountains descend to the strand. The three-foot line runs about 100 yards from the shore; but even 650 yards out the depth is only 15 feet. We executed our first line of soundings across the lake in the most delightful calm, and I steered the boat towards the point I had fixed by observations. At one o’clock the temperature was 49° F. in the water, and 50½° in the air. The depth increased very regularly, the maximum of 52.8 feet occurring not far from the northern shore. Robert was much delighted with the sail, and begged that I would always take him with me in future, which I the more readily granted that he was always cheerful and lively, and that he gave me valuable help in all observations. A little bay on the north shore served us as a landing-place. We surveyed the neighbourhood, and then hurriedly ate our breakfast, consisting of bread, marmalade, pâté de foie, and water. My companions had brought sugar, a tea-pot and enamelled bowls, but left the tea behind; but this forgetfulness only raised our spirits.
Then we put off again to make for the spring to the south-east. A row of stone blocks and lumps of salt ran out from the landing-place east-south-eastwards, and the water here was so shallow that we had to propel our boat with great care. Just as we had passed the last rock, of which I took a specimen, the west wind got up, the surface of the lake became agitated, and a couple of minutes later white horses appeared on the salt waves.
“Up with the sail and down with the lee-boards.”
The lake before us is tinted with shades of reddish purple, a reflexion from the clayey bottom; there it must be very shallow, but we shall soon pass it.
“Do you see the small white swirls in the south-west? Those are the forerunners of the storm, which stirs up the salt particles,” I said.
“If the storm is bad, the boat will be broken on the sharp ledges of the bottom before we can reach land,” remarked Robert.
“That is not clouds of salt,” said Rehim Ali; “that is the smoke of fires.”
“But Muhamed Isa should be camping at Sahib Deasy’s source; that lies towards the south-west.”