Note 14 — Chapter X · THE INTERPRETERS
Reading edition
Lt. Montgomery Meigs Macomb, assisted by J. C. Spiller and F. O. Maxson, explored the Yosemite region in 1878 and 1879. Their work was a part of the program of the U. S. Geographical Surveys West of the 100th Meridian, Capt. George M. Wheeler in charge. This program received the general direction of the Chief of Engineers, U. S. Army. Macomb's field work yielded the data for a map which was standard in the Yosemite region for many years (see U. S. War Dept., 1879).