Buck saw, and his mates saw, and they knew that this thing was very close to them.

On the next day Koona went, and but five of them remained: Joe, too far gone to be malignant; Pike, crippled and limping, only half conscious and not conscious enough longer to malinger; Sol-leks, the one-eyed, still faithful to the toil of trace and trail, and mournful in that he had so little strength with which to pull; Teek, who had not travelled so far that winter and who was now beaten more than the others because he was fresher; and Buck, still at the head of the team, but no longer enforcing discipline or striving to enforce it, blind with weakness half the time and keeping the trail by the loom of it and by the dim feel of his feet.
It was beautiful spring weather, but neither dogs nor humans were aware of it.

Each day the sun rose earlier and set later.

It was dawn by three in the morning, and twilight lingered till nine at night.

The whole long day was a blaze of sunshine.