Featured in this lot is this vintage Yellowstone National Park trail guide collection circa 1921-1964. There are three booklets and one guide map in this collection. The first item is a Yellowstone map from The Department of the Interior circa 1967. The next item is a booklet called The studies of Geysers and Hot Springs along the Firehole River Yellowstone National Park, Wyoming circa 1964. The third item is called Fishes of the Yellowstone National Park with description of the Park Waters and Notes on Fishing published from The Department of Commerce Bureau of Fisheries circa 1921. The next item is the third booklet in this collection called Yellowstone National Park, Wyoming published by The United States Department of the Interior circa 1938. The last booklet in this collection is called Chemical Features of Yellowstone by Douglass and was reprinted from Journal of Chemical Education vol. 16, No. 9 and circa 1939. The condition of this collection of guides is is fair to good and well preserved with fair to good overall display condition. The measurements of these guides range from 5 5/8" x 3 1/4" to 9 1/8" x 5 7/8".