cover 1839 (8 July) entire letter from Canton to London (21.12 arrival) showing, on reverse, oval "FORWARDED/BY/H. PARTRIDGE & KELLOG/CANTON" h.s. in red with "CANTON" crossed out and manuscript "Forwarded from Macao July 26th 1839" inserted along with manuscript "St. Helena 27th Oct. 1839 H.P.K.", "Forwarded from St. Helena by the U. States" and, on front, framed "INDIA LETTER/DEAL", endorsed by ship's captain "Mollison/Via U. States". A very rare and unusual routing via St. Helena. Photo