In early Yellowstone history, the concessions yielded little or nothing. When some leases were finally made the fees charged were so small that they yielded very little. When the troops were brought in it was assumed that there would be little expense for protection and administration, although Congress appropriated modest sums, gradually increasing, for roads, protection, and administration, particularly for roads. It was still believed that when the roads and administration facilities were established the early parks would be self-supporting. There was as yet no charge for admission to the

early parks. There was a gradual increase in concessioner facilities in Yellowstone, and they eventually yielded a small revenue; in 1910 investment by private concessioners in Yellowstone amounted to more than $1 million and total revenues from the concessioners in all the parks were $51,000. In all parks but Crater Lake, Mesa Verde, and Glacier, revenues could be used for administration, but in those three parks they had to be paid into the Treasury. Yellowstone at this time was the only park that had any considerable investment in visitors' facilities, or in roads.