At the request of the Crow chieftain the two parties encamped together, and passed the residue of the day in company.  The captain was well pleased with every opportunity to gain a knowledge of the “unsophisticated sons of nature,” who had so long been objects of his poetic speculations; and indeed this wild, horse-stealing tribe is one of the most notorious of the mountains.  The chief, of course, had his scalps to show and his battles to recount.  The Blackfoot is the hereditary enemy of the Crow, toward whom hostility is like a cherished principle of religion; for every tribe, besides its casual antagonists, has some enduring foe with whom there can be no permanent reconciliation.  The Crows and Blackfeet, upon the whole, are enemies worthy of each other, being rogues and ruffians of the first water.  As their predatory excursions extend over the same regions, they often come in contact with each other, and these casual conflicts serve to keep their wits awake and their passions alive.

The present party of Crows, however, evinced nothing of the invidious character for which they are renowned.  During the day and night that they were encamped in company with the travellers, their conduct was friendly in the extreme.  They were, in fact, quite irksome in their attentions, and had a caressing manner at times quite importunate.  It was not until after separation on the following morning that the captain and his men ascertained the secret of all this loving-kindness.  In the course of their fraternal caresses, the Crows had contrived to empty the pockets of their white brothers; to abstract the very buttons from their coats, and, above all, to make free with their hunting knives.

By equal altitudes of the sun, taken at this last encampment, Captain Bonneville ascertained his latitude to be 41 47’ north.  The thermometer, at six o’clock in the morning, stood at fifty-nine degrees; at two o’clock, P. M., at ninety-two degrees; and at six o’clock in the evening, at seventy degrees.

The Black Hills, or Mountains, now began to be seen at a distance, printing the horizon with their rugged and broken outlines; and threatening to oppose a difficult barrier in the way of the travellers.

On the 26th of May, the travellers encamped at Laramie’s Fork, a clear and beautiful stream, rising in the west-southwest, maintaining an average width of twenty yards, and winding through broad meadows abounding in currants and gooseberries, and adorned with groves and clumps of trees.

By an observation of Jupiter’s satellites, with a Dolland reflecting telescope, Captain Bonneville ascertained the longitude to be 102 57’ west of Greenwich.

We will here step ahead of our narrative to observe that about three years after the time of which we are treating, Mr. Robert Campbell, formerly of the Rocky Mountain Fur Company, descended the Platte from this fork, in skin canoes, thus proving, what had always been discredited, that the river was navigable.  About the same time, he built a fort or trading post at Laramie’s Fork, which he named Fort William, after his friend and partner, Mr. William Sublette.  Since that time, the Platte has become a highway for the fur traders.