Niagara Falls [map] : from surveys executed under the orders of Major C.B. Comstock, Corp of Engineers, Brvt. Brigadier General USA / survey made by Assistant Engineer F.M. Towar July and August 1875 and drawn by Asst. Engineer C. Donovan.Towar, F. M1875]Relief by soundings, hachures, contours; buildings shown; inset: Map of Niagara Falls, scale 1:2500; note above title: Survey of the northern and northwestern lakes made in obedience to Acts of Congress and orders from Headquarters of the Corps of Engineecartographic