Feature Comics #31

In "The Death Room," the Clock races to stop thieves who've stolen a dangerous military poison gas formula, leaping from one aircraft to another in a daring pursuit. When the crooks unleash the gas on him, he survives—leading him to suspect his mask, damp from the flight, may have saved him. Written, drawn, and inked by George Brenner, this 1940 thriller from Feature Comics #31 features a tense, high-stakes chase with a chilling twist, all rendered with the crisp, dynamic style of Ed Cronin on the cover.