…are they mighty?
The Doclopedia #2,603
The Doc Tempest Series: Doc Tempest And The Sound Of Death (1935)
Publication Date: June, 1935
Tale Type: Mysterious murder method used for revenge
In this mid-30s story, some body is using a sonic device that stops the heart of the person it is aimed at. It emits a wailing sound when used. Doc, Sally, Nick, and Carlos go to New Orleans to investigate.
This story is about a medium on the action scale, but rates pretty high in both interesting characters, local color, and spookiness.