cover Zanzibar 1910 (6 March) East Africa and Uganda 6c. postal stationery card uprated with Zanzibar 1c. strip of three, Portuguese Mozambique 20r. and German East Africa 2½h. and 4h., all cancelled on arrival in Beira; the card is addressed to the eminant philatelist George Worthington and was written on a steamer sailing from Mombasa to Beira via Zanzibar