Depths shown by soundings and gradient tints. Also shows lighthouses, composition of lake bottom, and shoreline land use and buildings. Includes: notes, sailing directions, and water table. "Made in obedience to acts of Congress and orders from Headquarters of the Corps of Engineers, War Department." Variant of: Karpinski, L.C. Bib. of the printed maps of Michigan, 964. Without "Sheet No. 4" and "(Plate 5)." 1 map; 94 x 87 cm, on sheet 104 x 92 cm.