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
Depths shown by soundings and gradient tints.
Includes notes and sailing directions.
"Aids to navigation corrected to February 2, 1887."
Stamped in purple at bottom: Aids to navigation corrected from information received to Dec 8 1892."