Their quick and suspicious eyes caught the slightest sinister movement, and they turned and scampered off.  At length one was taken.  He was terribly alarmed, and crouched and trembled as if expecting instant death.  Soothed, however, by caresses, he began after a time to gather confidence and wag his tail, and at length was brought to follow close at the heels of his captors, still, however, darting around furtive and suspicious glances, and evincing a disposition to scamper off upon the least alarm.

On the first of July the band of Crow warriors again crossed their path.  They came in vaunting and vainglorious style; displaying five Cheyenne scalps, the trophies of their vengeance.  They were now bound homewards, to appease the manes of their comrade by these proofs that his death had been revenged, and intended to have scalp-dances and other triumphant rejoicings.  Captain Bonneville and his men, however, were by no means disposed to renew their confiding intimacy with these crafty savages, and above all, took care to avoid their pilfering caresses.  They remarked one precaution of the Crows with respect to their horses; to protect their hoofs from the sharp and jagged rocks among which they had to pass, they had covered them with shoes of buffalo hide.

The route of the travellers lay generally along the course of the Nebraska or Platte, but occasionally, where steep promontories advanced to the margin of the stream, they were obliged to make inland circuits.  One of these took them through a bold and stern country, bordered by a range of low mountains, running east and west.  Everything around bore traces of some fearful convulsion of nature in times long past.  Hitherto the various strata of rock had exhibited a gentle elevation toward the southwest, but here everything appeared to have been subverted, and thrown out of place.  In many places there were heavy beds of white sandstone resting upon red.  Immense strata of rocks jutted up into crags and cliffs; and sometimes formed perpendicular walls and overhanging precipices.  An air of sterility prevailed over these savage wastes.  The valleys were destitute of herbage, and scantily clothed with a stunted species of wormwood, generally known among traders and trappers by the name of sage.  From an elevated point of their march through this region, the travellers caught a beautiful view of the Powder River Mountains away to the north, stretching along the very verge of the horizon, and seeming, from the snow with which they were mantled, to be a chain of small white clouds, connecting sky and earth.

Though the thermometer at mid-day ranged from eighty to ninety, and even sometimes rose to ninety-three degrees, yet occasional spots of snow were to be seen on the tops of the low mountains, among which the travellers were journeying; proofs of the great elevation of the whole region.