THE unstoppable Donald E. Keyhoe had a story in a majority of the issue of Flying Aces from his first in January 1930 until he returned to the Navy in 1942. Starting in August 1931, they were stories featuring the weird World War I stories of Philip Strange. But in November 1936, he began alternating these with sometime equally weird present day tales of espionage Ace Richard Knight—code name Agent Q. After an accident in the Great War, Knight developed the uncanny ability to see in the dark. Aided by his skirt-chasing partner Larry Doyle, Knights adventures ranged from your basic between the wars espionage to lost valley civilizations and dinosaurs. Secret agents from a dozen countries have all rushed into the Mediterranean for something—but what? Knight and Doyle set out to find out just what it could be. The carrier from which they’ve just taken off mysteriously and soundlessly explodes leaving nothing behind! Just what is out there?

Toward grim Gibraltar, Dick Knight sped his sleek Vought. For Europe’s craftiest spies were hurrying into that caldron of intrigue just beyond “The Rock”—and Washington’s orders had been terse: “Find out why”! But already that sinister sea was red with the blood of rash agents who had ventured too far. And already it was too late for Dick Knight to turn back. For he had defied muted murder—had defied “The Death that had no face”!

• Download “Vultures of Silence” (May 1938, Flying Aces)