First appearance: [b][i]Smash Comics #1[/i][/b] (August 1939)
[img]https://i.servimg.com/u/f67/18/91/37/14/-_000_61.jpg[/img]
[img]https://i67.servimg.com/u/f67/18/91/37/14/--_a_i12.jpg[/img]
[img]https://i67.servimg.com/u/f67/18/91/37/14/--_b_i12.jpg[/img]
And in the following issue, Thurston actually gains the ability to become invisible.