essay 1989, artwork, with artist's coloured drawings (each approx. 80x90mm.) on cards for Frogs and Toads (Amphibians of Zambia) and Bats of Zambia first day cover designs; also 1980 Parliamentary Conference mock-up on card (165x140mm.) and artwork incorporating UNICEF emblem for 1988 Child Survival Campaign first day cover; 4 items