Next day there was a gale from the north, and once more the whole plain was a mass of drifting snow. In addition to this there was thick falling snow, which blinded us and made things worse, but a feeling of security had come over us and helped us to advance rapidly and without hesitation, although we could see nothing. That day we encountered new surface conditions—big, hard snow waves (sastrugi). These were anything but pleasant to work among, especially when one could not see them. It was of no use for us “forerunners” to think of going in advance under these circumstances, as it was impossible to keep on one’s feet. Three or four paces was often the most we managed to do before falling down. The sastrugi were very high, and often abrupt; if one came on them unexpectedly, one required to be more than an acrobat to keep on one’s feet. The plan we found to work best in these conditions was to let Hanssen’s dogs go first; this was an unpleasant job for Hanssen, and for his dogs too, but it succeeded, and succeeded well. An upset here and there was, of course, unavoidable, but with a little patience the sledge was always righted again.… It is a difficult matter to drive Eskimo dogs forward when they cannot see; but Hanssen managed it well, both getting the days on and steering his course by compass. One would not think it possible to keep an approximately right course when the uneven ground gives such violent shocks that the needle flies several times round the compass, and is no sooner still again than it recommences the same dance; but when at last we got an observation, it turned out that Hanssen had steered to a hair, for the observations and dead reckoning agreed to a mile. In spite of all hindrances, and of being able to see nothing, the sledge meters showed nearly twenty-five miles.