Boys' and Girls' March of Comics #131

In "The Secret of the Rocks," drought and debt threaten Dave’s ranch, a place whispered to hold the buried treasure of an ancient Aztec legend. When Roy arrives with his friends Tad and Pat, their journey into a limestone cavern leads to a tense showdown with wild boars, a hidden flintlock, and a shocking discovery beneath the earth—before a collapsing roof traps them inside. Written by Gaylord Du Bois and illustrated by John Buscema with inks by Mario Acquaviva, this 1955 adventure blends frontier grit with mystery, all wrapped in a free cover by an unknown artist.