James sez, "James Montgomery Flagg, the guy who painted the famous Uncle Sam recruitment poster also penned a series of comics in the early 1900's called Nervy Nat. The folks at ASIFA posted a bunch, and the first, 'Nervy Nat as an Aeronaut' features a boozy Nat sailing to Venus in a Zeppelin."
Cartooning: James Montgomery Flagg's Nervy Nat
(Thanks, James!)