HECKSCHER: 1835, "FORWARDED BY C.A. HECKSCHER NEW YORK", red oval cachet on reverse of folded letter initially addressed to Thomas Wilson, the Forwarder, in London, with boxed "PORTSMOUTH SHIP LETTER" final destination Copenhagen with manuscript routing "via Hamburg" and matching oval "St.P.A. 25 JUL. 1835" on reverse, fine