cover 1937 (Sept.) envelope (opened-out) from South Africa to Durban and re-addressed to Baira and then to London bearing Postage ½d. (2) and Due 3c. (Mozambique) and 1d. (G.B.) showing various Tax, instructional and transit h.s. also 1937 envelope from South Africa to Mozanbique showing "Unclaimed" ad "Returned to Sender" bilingual h.s. in Portugese and Frence and 1938 underpaid envelope from England to Vila Pery bearing Postage 1½d. and Mozambique Due 3c. pair and showing various Tax markings and "Beira-Umtali" T.P.O. c.d.s. (on reverse). An interesting trio