1848 (May 17) Ottawa, Canada to Chicago Ill., datelined folded letter addressed to the Trustees of the Illinois & Michigan Canal, flap with sender's note "Capt. of Packet will confer an Especial Favor by forwarding this to the canal office immediately on his arrival in Chicago, The bearer will be paid him 2/- for his trouble…", entered U.S. mails with red "Paid" and "5" rating handstamps; light toning, F.-V.F., A scarce cross-border steamboat letter. Estimate  $400 - 600. $0 (Image)