Washington, January 3, 1881. Sir: I have the honor to submit herewith an illustrated catalogue exhibiting in part the results of the ethnologic and archaeologic explorations made under your direction in New Mexico and Arizona during the summer of 1879. As you are already familiar with the mode of travel and the labor necessary in making such investigations and explorations, as well as the incidents common to such undertakings, and as I do not consider them of any special interest or value to the catalogue, I have omitted such details. I beg, however, in this connection, to refer to the services of Messrs. F. H. Cushing, ethnologist of the Smithsonian Institution, and J. K. Hillers, photographic artist of the Bureau of Ethnology, both of whom accompanied me on the expedition