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He faced the Python Men in the Lost City, and...well, that's it!
He only made one appearance!
There was no second issue!
Pity, since he had a lot of potential.
At least he left behind a cool cover, which we've digitally-restored and remastered onto a plethora of products including shirts, mugs, etc. at Capt Hazzard: Adventurer for those with an Indiana Jones/high adventure leaning!
(Actually, much like Alex Ross has done with old comics characters in Project SuperPowers, noted writer Ron Fortier is reviving the Capt Hazzard pulp series, both with a rewritten version of the original novel "Python Men of the Lost City" and a series of new novels.)
Google for the books, and visit Ron's Capt Hazzard product site at Team Hazzard.