Doc Stealth Window

Suddenly there impinged upon the ears of Squint a weird, soft, trilling sound, like the song of a mysterious jungle bird. It was a note without equal anywhere else in the universe, melodious, but possessing no definite tune. It had a unique quality of emanating from everywhere, as though the very air in the shabby room was giving birth to it.

The trilling sound struck terror into Squint's evil soul. He whirled, not knowing what he would see.

An awful scream tore through his teeth.

For the rickety window had lifted noiselessly. Equally without sound, the shabby curtain had moved aside.

There, poised like some huge bronze bird of vengeance upon the window sill, was Squint's doom.

"Doc Savage!" the rodent of a man wailed. Convulsively, Squint clutched for the revolver he had secured aboard the pirate ship.

- The Land of Terror (1933) Chapter 4