Wear and rubbing to cloth, corners lightly bumped; hinges appear to have been reglued at some point. Toning to interior and maps; all maps present, most with edgewear and occasional small tears at stubs, occasional tape repairs, map of Wyoming detached but laid in, with many tears at folds and a few pieces lacking; good or better. The book is square and the binding secure. Significant survey with an important color geologic map including Yellowstone National Park; many of the maps are large scale trail maps. This is the expanded, and more important, second edition of this report which includes Yellowstone National Park. Howes 245. ; 51 Maps and Charts; Large 8vo 9" - 10" tall; 331 pages