(Action Comics v1 032-033, 1941)
Mister Z is actually plantation owner Grasso, who is actually X-11, notorious agent of a "hostile government" whose schemes are placed in jeopardy when a mineral deposit is discovered near his hideout in Colombia. His efforts to shut down the incipient mining operations bring in adventurer Clip Carson but he meets his actual end when he's gunned down by a young boy whose father he had killed.
