Judith Basin : drawn under the direction of Capt. W. Ludlow Corps of Engineers, to accompany his report. N. Peters, Photo Lithographer, Washington, D.C. (to accompany) Report of a Reconnaissance From Carroll, Montana Territory, on the Upper Missouri, to the Yellowstone National Park, and Return Made in the Summer of 1875, by William Ludlow ... Washington: Government Printing Office. 1876.

Relief shown by form lines. Shows exploration routes and dates.
Early maps of Yellowstone; Wheat 1257,1258,1259. 155 pages, illustrations, plates , and 3 folded uncolored maps. Bound with blue cloth covered boards with title on spine in gold "Carroll Montana to Yellowstone National Park; Ludlow 1875." Contents includes: General report, by W. Ludlow.--Trip to the Judith basin; trip form Carroll to Ellis, by R. E. Thompson.--Zoological report, by G. B. Grinnell.--Geological report, by E. S. Dana and G. B. Grinnell.--Description of new fossils, by R. P. Whitfield.
Howes L557.