The wolves were in great force--both prairie-wolves, and those of the large grey species.

The scent of the broiling meat had attracted them from afar; and throughout the night they kept up a continuous howling, trotting all over the meadow around the camp.
Francois kept the first watch, and Lucien the second; Basil's turn came next, and it was to extend till daybreak, when all were to be aroused-- so that they might pack up at a very early hour, and continue the journey.

They did not wish to lose a moment more than was necessary--as they knew that every hour the migrating herd would be gaining upon them, and thus prolong the pursuit.
Basil's watch was a long one; and, having sat up so late, he felt sleepy.

He was, therefore, in no very friendly humour with the wolves-- upon whose account he was thus compelled to keep awake.

Every now and then, as he saw them sneaking about in the darkness, he could not help muttering an angry ejaculation; and he had made up his mind, as soon as morning came, to empty his gun at one of the pack, by way of satisfying his feelings.
After a spell of watching, that lasted nearly three hours, he perceived the first streaks of dawn in the east.
"By the time we get breakfast cooked," thought Basil, "there will be light enough to follow the trail; so I'll rouse Frank and Luce; and, by way of a change, I'll give them a _reveille_ with my rifle.