Statement of responsibility: described by Professor F.V. Hayden ... ; illustrated by chromolithographic reproductions of water-color sketches by Thomas Moran, artist to the expedition of 1871.
Statement of responsibility: "As to my own share in the work... I have confined myself to a short account of the discovery of the Yellowstone region, and of its natural features, together with a concise description of the illustrations"--Pref. by Hayden.