Martin & Osa Johnson travelled all over the world from 1917 to 1936 making documentary films in locations like Borneo and Kenya.
They got their pilot's licenses and bought a couple of Sikorsky flying boats in the early Thirties and were the first people to fly over Kilimanjaro and film it from the air.
Now I want to track down a copy of Among the Cannibal Isles of the South Seas.
.