Air Mail cover 1927 (March) British and Irish postal stationery envelopes (both suitably uprated) and addressed to Jinja, showing manuscript "1st flight from Cairo" (or similar) on both, also 1927 (28-29 Sept.) envelopes (2) from England and carried by the R.A.F. from Cairo to Khartoum, and by Capt. Gladstone from Khartoum to Nairobi respectively