British East Africa. (Zanzibar - India). 1896. India postal stationery envelope 'Two Annas and Six pies black on 4 1/2a yellow-orange overprinted 'British East Africa' cancelled by Mombasa squared circle 'Jan 22 96', endorsed 'By the First Mail' with Zanzibar transit '26th Jan 96' with Bombay and Fort Bombay 1st DELAY arrivals 'Fe 10 96'.