CAPE TOWN PAQUEBOT MAIL; Trio with Mar. 1937 'VISIT OF H.M.S. CARLISLE' commemorative env. to England with v. fine double-ring "TRISTAN DA CUNHA" UDC, Cape Town Paquebot cds, bold "1D." hs and GB 1d p.due tied to front plus pair of Feb. 1939 envs. (one with contents on P&O letterhead) to England or Scotland with double-ring "TRISTAN DA CUNHA" UDC on front with Cape Town PAQUEBOT cds or machine cancel and both with octagonal "T/15c" p.due marks on front. (3 covers) Cross Reference: INCOMING OVERSEAS MAIL, SOUTH AFRICA, PAQUEBOTS, POSTAGE DUE MARKS (Image)