Arthur B. Reeve,
The Stolen War Secret — XI. The Radio-Detective
(1914)
“ He had diverged off toward the kiosk and the wireless-apparatus which he had rigged up during the afternoon. Loosening the wires, he carried the apparatus bodily with him into the house where Sinclair had the phonograph in his splendidly equipped library. “This is what I might call my radio-detective,” explained Kennedy with just a trace of pride in his voice, as we entered. “Even if it is mainly improvised, I think it is built up on a very compact system and ought to prove efficient.” ”
