1940 Sheet No. 20, St. Lawrence River  Survey Map.  Approx. 31" x 42" size.  Published by U.S. Army Corps of Engineers from newer and older datum dating to the 1870's and 1901 & 1902. Shows Cornwall Island and St. Regis Island, Raquette River Inlet, St. Regis, Quebec and Hogansburg, N.Y. Cornwall area shows some of the industries. Some losses to bottom of chart .   Basically a depth chart of the surrounding river  waters. (see photos - some duplicated-for more details and any condition issues.