And this is the first comic in which Tobor says his signature line. Although it really isn't Tobor, just some guy in a Tobor costume.
[Click to view comic: 'Serial Comic: the April-soft freshness of Downey']
So this would be the first fully realized Tobor appearance, wherein he appears in all his cornholing glory.
[Click to view comic: 'My first sale!']
This is a much later thread in which I explore Tobor's origin. While it's an fun story, it is by no means canon. But it's a pretty good theory.
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...Trot and Cap'n Bill were free from anxiety and care. Button-Bright never worried about anything. The Scarecrow, not being able to sleep, looked out of the window and tried to count the stars.