The Spectral Stranglers

Published in the 03/1934 issue of Secret Agent X.
"Silent, horrible as the crushing coils of a serpent were those unseen fingers that blotted out men’s lives. A criminal of satanic proportions had risen—the “Black Master,” whose victims fell with livid, hideous faces and protruding tongues that seemed a ghastly mockery of the fate they had suffered. Along this terrible murder trail Secret Agent “X” gambled with the Dice of Death."