The real explanation of this remarkable ignorance appears to us to rest on grounds essentially practical. There was nothing to induce the Indians to visit the Park country. For three-fourths of the year that country is inaccessible on account of snow. It is covered with dense forests, which in most places are so filled with fallen timber and tangled underbrush as to be practically impassable. As a game country in those early days it could not compare with the lower surrounding valleys. As a highway of communication between the valleys of the Missouri, Snake, Yellowstone, and Bighorn Rivers, it was no thoroughfare. The great routes, except the Bannock trail already described, lay on the outside. All the conditions, therefore, which might attract the Indians to this region were wanting. Even those sentimental influences, such as a love of sublime scenery and a curiosity to see the strange freaks of nature, evidently had less weight with them than with their pale-face brethren. Summarizing the results of such knowledge, confessedly meager, as exists upon this subject, it appears: (1.) That the country now embraced in the Yellowstone National Park was occupied, at the time of its discovery, by small bands of Sheepeater Indians, probably not exceeding in number one hundred and fifty souls. They dwelt in the neighborhood of the Washburn and Absaroka Ranges, and among the mountains around the sources of the Snake. They were not familiar with the geyser regions. (2.) Wandering bands from other tribes occasionally visited this country, but generally along the line of the Yellowstone River or the Great Bannock Trail. Their knowledge of the geyser regions was extremely limited, and very few had ever seen or heard of them. It is probable that the Indians visited this country more frequently in earlier times than since the advent of the white man. (3.) The Indians avoided the region of the Upper Yellowstone from practical, rather than from sentimental, considerations.