History tells us that they wintered at the Mandan village near the headwaters of the Missouri and that strange river which the Indians called Yellowstone, on account of the predominating color along its banks. The following spring the Lewis and Clark expedition continued on its way, reaching the Columbia River, and following it down until, at its mouth, they beheld the goal of all their hopes, the glorious ocean that lay bathed in the glow of the setting sun. NOTE 2 (PAGE 26) In those days, when the Indians of the Northwest did not have the Great White Father at Washington to supply them with rations and fresh beef, it was customary for the various tribes to participate in annual fall hunts, so that sufficient meat might be procured to last them through the long, cold winters. Sometimes they went after buffalo, which at that day were to be found in immense herds, and often the most wanton destruction was indulged in, traps being laid whereby the great animals were driven by hundreds over some precipice, so that the Indians hardly bothered taking anything but the tongues of their victims, which they cured by drying in the smoke of their fires. In spite of this slaughter the herds continued to increase until modern man, with his repeating rifle, made his appearance, at the time the first railroad was being built across the continent, when they quickly reached the point of practical extermination. More often the meat obtained in these fall hunts was venison. This the Indians cured by drying in the sun. Thus prepared, it would keep for any length of time, if not allowed to get wet. It is not the nicest food an epicure might select, being dark-looking, and often as hard as flint; but pemmican, as this dried venison is called, can be made into a palatable dish when properly cooked. When an Indian was sent on a trip of perhaps two hundred miles, to take a message to another tribe, he would simply carry along with him in his pouch a handful of this pemmican, which would serve him as a means of sustenance throughout his long journey, washed down with an occasional drink from some spring that he would discover on the trail. NOTE 3 (PAGE 128) Probably the giant geyser which performed such a splendid service for our two young heroes was the one known for many years as Old Faithful, from the fact that, while other geysers in Yellowstone Park may seem grander on occasion, they are often erratic in their flow, and not to be depended on. Old Faithful has often been described, and is an object of such general interest among the visitors to the National Park that a large hotel has been built so close that one can sit in an easy-chair within a few hundred yards, and view its spectacular upheaval.