At head of title: Survey of the Northern and Northwestern Lakes. Made in obedience to acts of Congress and orders from the Headquarters of the Corps of Engineers, War Department.
Projected from a trigonometrical Survey executed under the Superintendence of Major C.B. Comstock, Corps of Engrs Brvt. Brig. Genl. U.S.A. by A.C. Lamson in 1872. Compiled and reduced by J.U. Mueller in 1874.