Air Mail cover 1936-39 envelopes (15), mainly carried on first or special flights, including 1936 (Mar.) Imperial Airways to London (3, one addressed Penang and one to India), (July) "Delphinus" to India, 1937 (Apr.) F.A.M. 14 to Manila, San Francisco (2) and from Macao to Guam, 1937 (June) Eurasia Aviation Corporation to Hankow, (Aug.) commercial envelope registered to Trinidad bearing 1925 $5 and 1940 (Feb.) to British Guiana franked at $4.50