Valley of Blind Men

Published in Operator #5 #24, March 1936
"Captain John Vedders follows the trail of three whispered words on a dead man's lips to a smashing, death-in-the-air finale!" "The whole set-up caught Captain John Vedders, Military Intelligence, flatfooted: his murdered comrade, the blindness plague, a pretty girl, and three whispered words on a dead man’s lips... But Vedders hadn’t made his reputation by quitting against odds, and he mixed all those clues with a battery of field guns to make a smashing death-in-the-air finale!"