Page:The Worst Journey in the World volume 2.djvu/263

504 we all felt considerably, but temperature was only −18° at lunch and −15° in the evening. Now just over 40 miles from the Pole." Scott wrote the same day: "Again we noticed the cold; at lunch to-day all our feet were cold but this was mainly due to the bald state of our finnesko. I put some grease under the bare skin and found it make all the difference. Oates seems to be feeling the cold and fatigue more than the rest of us, but we are all very fit." And on January 15, lunch: "We were all pretty done at camping." And Wilson: "We made a depôt [The Last Depôt] of provisions at lunch time and went on for our last lap with nine days' provision. We went much more easily in the afternoon, and on till 7.30 The surface was a funny mixture of smooth snow and sudden patches of sastrugi, and we occasionally appear to be on a very gradual down gradient and on a slope down from the west to east." In the light of what happened afterwards I believe that the party was not as fit at this time as might have been expected ten days before, and that this was partly the reason why they felt the cold and found the pulling so hard. The immediate test was the bad surface, and this was the result of the crystals which covered the ground.

Simpson has worked out that there is an almost constant pressure gradient driving the air on the plateau northwards parallel to the 146° E. meridian, and parallel also to the probable edge of the plateau. The mean velocity for the months of this December and January was about 11 miles an hour. During this plateau journey Scott logged wind force 5 and over on 23 occasions, and this wind was in their faces from the Beardmore to the Pole, and at their backs as they returned. A low temperature when it is calm is paradise compared to a higher temperature with a wind, and it is this constant pitiless wind, combined with the altitude and low temperatures, which has made travelling on the Antarctic plateau so difficult.

While the mean velocity of wind during the two mid-summer months seems to be fairly constant, there is a very