found: Bebenroth, C.M. Meriwether Lewis, boy explorer, 1953: t.p. (Edward Caswell)
found: LC data base, 7-29-85 (hdg.: Caswell, Edward C.; usage Edward C. Caswell)
found: Second base Sloan, c1917 t.p. (E.C. Caswell)
found: Google search, 2007 Dec 13 (1879-1963)
found: askart.com, Apr. 12, 2011 (b. in NYC; lived in NYC; profession: illustrator, drawing specialist, lecturer, teacher, writer)
found: petersnewyork.com, Apr. 12, 2011 (newspaper and book illustrator; in 1920s had a studio in Brooklyn, and later in Manhattan)