Survey of the Columbia River between Celilo and the Dalles : October 1879 to January 1880 / by the order of Major G.I. Gillespie & under the direction of Lieutenant Charles F. Powell, Corps of Engineers, U.S.A. ; instrumental work by Messrs F.W. Lehnartz ... [et al.] ; drawing by Messrs J.A. Gillespie & F.J. Carrel.