On the twenty-second of August, early in the day, they came upon the trail of a numerous band.  Rose and the other hunters examined the foot-prints with great attention, and determined it to be the trail of a party of Crows, returning from an annual trading visit to the Mandans.  As this trail afforded more commodious travelling, they immediately struck into it, and followed it for two days.  It led them over rough hills, and through broken gullies, during which time they suffered great fatigue from the ruggedness of the country.  The weather, too, which had recently been frosty, was now oppressively warm, and there was a great scarcity of water, insomuch that a valuable dog belonging to Mr. M’Kenzie died of thirst.

At one time they had twenty-five miles of painful travel, without a drop of water, until they arrived at a small running stream.  Here they eagerly slaked their thirst; but, this being allayed, the calls of hunger became equally importunate.  Ever since they had got among these barren and arid hills where there was a deficiency of grass, they had met with no buffaloes; those animals keeping in the grassy meadows near the streams.  They were obliged, therefore, to have recourse to their corn meal, which they reserved for such emergencies.  Some, however, were lucky enough to kill a wolf, which they cooked for supper, and pronounced excellent food.

The next morning they resumed their wayfaring, hungry and jaded, and had a dogged march of eighteen miles among the same kind of hills.  At length they emerged upon a stream of clear water, one of the forks of Powder River, and to their great joy beheld once more wide grassy meadows, stocked with herds of buffalo.  For several days they kept along the banks of the river, ascending it about eighteen miles.  It was a hunter’s paradise; the buffaloes were in such abundance that they were enabled to kill as many as they pleased, and to jerk a sufficient supply of meat for several days’ journeying.  Here, then, they reveled and reposed after their hungry and weary travel, hunting and feasting, and reclining upon the grass.  Their quiet, however, was a little marred by coming upon traces of Indians, who, they concluded, must be Crows:  they were therefore obliged to keep a more vigilant watch than ever upon their horses.  For several days they had been directing their march towards the lofty mountain descried by Mr. Hunt and Mr. M’Kenzie on the 17th of August, the height of which rendered it a landmark over a vast extent of country.  At first it had appeared to them solitary and detached; but as they advanced towards it, it proved to be the principal summit of a chain of mountains.  Day by day it varied in form, or rather its lower peaks, and the summits of others of the chain emerged above the clear horizon, and finally the inferior line of hills which connected most of them rose to view.  So far, however, are objects discernible in the pure atmosphere of these elevated plains, that, from the place where they first descried the main mountain, they had to travel a hundred and fifty miles before they reached its base.  Here they encamped on the 30th of August, having come nearly four hundred miles since leaving the Arickara village.