YouTube videos:

Martin and Osa Johnson
(photo montage video)
https://www.youtube.com/watch?v=ZZDwVKNzEmo

Osa Johnson - Female Explorer & Filmmaker Takes Down a Rhino in One Shot!
https://www.youtube.com/watch?v=M24y9seWXj0

Martin and Osa Johnson - History Channel
https://www.youtube.com/watch?v=jVCHnOJtalU

"Adventure - The Story of Osa Johnson"
https://www.youtube.com/watch?v=zM0UTQUC5EA

1929 Sikorsky S-38 Osa's Ark (Jimmy Buffett flies her.)
https://www.youtube.com/watch?v=jz47EEDWkO0
Note: This is NOT the Johnson's actual S-38 airplane. It is, however, an authentic S-38 that's painted to look like Osa's Ark. I believe that Kermit Weeks is the current owner of this airplane. (RIP, Jimmy.)

Sikorsky S-38 Osa's Ark

Sikorsky S-39 Spirit of Africa

Cheers! Bob F.