Street & Smith · April, 1941
Vol. 4 #6
The Castle of Iron; The Forbidden Trail; They; Over the River; The Haunt; A Length of Rope
Writers: L. Sprague de Camp, Fletcher Pratt, Jane Rice, Robert A. Heinlein, P. Schuyler Miller, Theodore Sturgeon, Chester S. Geier
Artists: Cartier, R. Isip, Schneeman