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.