Sparkler Comics — United Features
Issue: #10
Last valuation update: 2026-01-16
Spark Man unmasks in a comic book first
First appearances: Hap Hopper
Creators: Edgar Rice Burroughs
Characters: Tarzan, Broncho Bill, Hap Hopper, Hans Katzenjammer, Slats, Ella Cinders, Abbie, Fritz Katzenjammer, Nancy, Spark Man, Dur Captain, El Bombo