1837 Town of Chicago - A map of the town of Chicago; filed May 29, 1837; record in Book H, pp. 111-112; "W.F. Thornton, W.B. Archer and G.S. Hubbard, late Commissioners of the Illinois and Michigan Canal, certify that this map of the town of Chicago is the identical map by which they were governed in selling lots belonging to the said town on the 20th and following days of June last past. Chicago, May 22, 1837" [Chicago History Museum Library].