[The Australian Panther]

Bob Powell is credited as the artist on 'Camilla'.
Now, "Powell went to work for the Eisner-Iger studios in the late 1930s. He worked for many companies through this studio, like Fiction House (Jumbo Comics), ......."
https:www.lambiek.net/artists/p/powell_bob.htm
This may well be his work, but it has little of his characteristics so I have my doubts. Then again we have Nick Cardy, Fletcher Hanks, Charles Sultan and Henry Kiefer here and they all look much of a muchness. Obviously very early work for all of them.
The Captain Terry Thunder ends with a three panel passionate kissing scene followed by an ad for Fireworks?!! somebody's little joke?

Link to the book: Jungle Comics 006