COLTON, George Woolworth (1827-1901). Colton's County and Township Rail Road Map of Wisconsin, Illinois, Missouri, & Iowa. New York and Chicago: G. Woolworth Colton, Rufus Blanchard, 1863. Engraved folding map hand-colored in wash and outline, 742 x 660 mm image (749 x 664 mm sheet). (A few short tears to folds, slightly browned.) Bound in original gilt- and blind-stamped brown cloth covers, printed advertisements to upper pastedown (some very light wear to spine ends). RARE.