Masks Over Madrid

Published in Flying Aces, July 1937.
"Above those barrage-battered buildings of Madrid, vengeful Heinkels had hemmed in a lone flyer, were pouncing in for the kill. Fascinated, Richard Knight stared up at that grim drama, saw the doomed airman cast from his lead-flailed cockpit an oddly-fashioned chest bound to the chute that would have saved him. But when Richard Knight pried the lid from that strange box, he halted, transfixed. Inside was naught but a yellowed human skull. why had a man given his life for this?"