"Report upon United States Geographical Surveys West of the One Hundredth Meridian"
Vol VII -- Archeology
(Published by Authority of The Honorable Secretary of War in 1879)
in charge of First Lieut. Geo. M. Wheeler
under the direction of Brig. Gen. A. A. Humphreys
Original Heliotype print (photogravure)
Sheet size = about 7.875 x 10.675 inches
age toning, discoloration at top and right margins