We further had to make full arrangements for a regular supply of yak-dung, the whole of which, as in fact everything to burn in Tibet, is called “shing,” which really means wood; all our fuel, therefore, from now on, will be referred to as “shing.” All tzampa,[3] meat, and grain for the men had to be procured as far down as Chobu, Tashishong, and even from other villages still further down the Dzakar Chu; that is to say, very often our supplies were brought up from at least 40 miles distant. We required a pretty continuous flow of everything. It is wonderful how much even seventy men can get through. Footnote 3: Flour. The preliminary reconnaissance had fixed an excellent camp as our first stage out. Geoffrey Bruce and Morris, with our own porters went up, and, so as to save tents, built a number of stone shelters and roofed them with spare parts of tents. This camp was immediately provisioned and filled with every kind of supply in large amounts in order to form again a little base from which to move up further. Strutt returned with his reconnaissance on May 9, having made a complete plan for our advance and having fixed all our camps up to the flat glacier under the North Col. During this period Finch had also been very active with his oxygen apparatus, not only in getting it all together, but continuing the training of the personnel and in making experiments with the Leonard Hill apparatus as well. He also gave lectures and demonstrations on the use of our Primus stove, with which everybody practised. Primus stoves are excellent when they are carefully treated, but are kittle cattle unless everything goes quite as it should, and are apt to blow up.