In fact, some of these wolves, both of the white and prairie species, seem to have no fixed place of abode; but hang upon the skirts of the buffalo "gangs" throughout all their extended migrations.
I have said that, upon the second night after leaving the butte, our travellers went to sleep supperless.

On the third day, they began to feel the cravings of hunger in good earnest.

Neither beast nor bird appeared in sight upon the wild desert plains that stretched inimitably around them.

About noon, as they were riding through a thicket of the wild sage (_Artemisia tridentata_), a brace of those singular birds, sage-cocks or prairie-grouse (_Tetrao urophasianus_), the largest of all the grouse family, whirred up before the heads of their horses.
Francois, with his ever-ready gun, fired at them, but they were too distant for the shot; and the next moment both disappeared over the swells of the prairie.

The sight only tantalised the unsuccessful hunters, and added to the hungry craving of appetites already sharp almost beyond endurance.