The first United States troops which arrived here came in July, 1840, under the command of Major Sanderson of the Mounted Rifles. They were companies C and D of that regiment. Company G of the Sixth United States Infantry arrived in August of the same year under command of Captain Ketchum. In the summer and fall of 1840 a large number of additions were made to the buildings at the post. In 1846, just prior to its occupancy by the United States, Francis Parkman, the future historian, then little more than a boy, visited Fort Laramie and wrote a description of the place in that singularly vivid style which characterized his best work as a historian. His description may be abridged: Looking back, after the expiration of a year, upon Fort Laramie and its inmates, they seem less like a reality than like some fanciful picture of the olden time; so different was the scene from any which this tamer side of the world can present. Tall Indians, enveloped in their white buffalo robes, were striding across the area or reclining at full length on the low roofs of the buildings which enclosed it. Numerous squaws, gayly bedizened, sat grouped in front of the rooms they occupied; their mongrel offspring, restless and vociferous, rambled in every direction through the fort; and the trappers, traders, and engagees of the establishment were busy at their labor or their amusements.... Fort Laramie is one of the posts established by the “American Fur Company” which well nigh monopolizes the Indian trade of this region. Here its officials rule with an absolute sway; the arm of the United States has little force; for when we were there the extreme outposts of her troops were about seven hundred miles to the eastward. The little fort is built of bricks dried in the sun, and externally is of an oblong form, with bastions of clay, in the form of ordinary blockhouses, at two of the corners. The walls are about fifteen feet high, and surmounted by a slender palisade. The roofs of the apartments within, which are built close against the walls, serve the purpose of a banquette. Within, the fort is divided by a partition: on one side is the square area, surrounded by the offices, store-rooms and apartments of the inmates; on the other is the corral, a narrow place, encompassed by high clay walls, where at night, or in presence of dangerous Indians, the horses and mules of the fort are crowded for safe keeping. The main entrance has two gates, with an arched passage intervening. A little square window, high above the ground, opens laterally from an adjoining chamber into this passage; so that when the inner gate is closed end barred, a person without may still hold communication with those within, through this narrow aperture. This obviates the necessity of admitting suspicious Indians, for the purposes of trading, into the body of the fort; for when danger is apprehended, the