Depths shown by soundings and isolines. At head of title: seal with "United States Lake Survey 1867." "Additions and Corrections to June 1st 1893." "Made in obedience to acts of Congress under the direction of the Bureau of Topographical Engineers of the War Department." Also shows mills and other points of interest along the bay including composition of river bottom. Includes "Sailing directions." 1 map; 57 x 96 cm, on sheet 66 x 106 cm.