Crack Comics #35 (1944)

In "The Man Who Conquered Flame," Lance and Biff journey to Egypt to meet Dr. Marfree and his partner, Dr. Vossburg, scientists claiming to have mastered the power to turn water into flame. But when they arrive, Marfree is dead, and Vossburg reveals his true, terrifying nature—flames erupting from his mouth as he closes in on them.

In a 1944 mystery that baffles both the police and the Clock, a series of crimes leaves only footprints that vanish into thin air—until the Clock and his aide Butch track the elusive culprit to a fur shop, only to find the little man who’s been seen everywhere and nowhere suddenly disappear without a trace. As the Clock and Butch split up to follow the gang and the mysterious look-out, the chase leads to a shocking revelation: the criminal mastermind isn’t just clever—he’s using an invisible gas to vanish, and he’s been framed by a desperate inventor trying to prove his invention was real.