Dr. Lawler's serum would revert any person to a more primitive state—physically, not mentally. Armed with his antidote, he injected himself to prove his theories. What could possibly go wrong?
Robert E. Howard, Henry Kuttner, H. P. Lovecraft, Mary Elizabeth Counselman, Miriam Allen DeFord, Paul Compton, Edmond Hamilton, Lloyd Arthur Eshbach, Theodore Sturgeon, Jamie Wild, C. L. Moore, Leah Bodine Drake, Manly Wade Wellman, Pearl Norton Swet, August Derleth, Dorothy Quick, Warren Lapine, Ronal Kayser, H. Beam Piper, Earl Peirce, Jr., Frank Belknap Long, Paul Ernst, Seabury Quinn, David H. Keller, Greye La Spina & Franz Habl
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Mark Thielman, Eve Fisher, Joslyn Chase, Edmund Glasby, Hal Charles, Allen Kim Lang, Randall Garrett, Manly Wade Wellman, Nelson S. Bond & Isabel Ostrander
Janice Law, William Burton McCormick, Steve Janko, Henry T. Parry, Hal Charles, William Le Queux, Manly Wade Wellman, Charles L. Fontenay, Hannes Bok & William W. Stuart