We fell down on this soft soil and rested for fifteen minutes. But within this short time, the soil began to freeze, and we had to take up our pick-axes again. We repeated this operation several times before the depth of the dugout reached about 2 metres. Then we sawed logs, planned the location of the observation post, built a roof for it and placed a field artillery periscope inside. At dawn we covered the roof with soil, fir branches, and snow. Exhausted but satisfied with the work we had done, we dropped to the floor of the post and fell asleep.