Far above the Arabian Desert three Secret Service men find an aerial island whose inhabitants areómadmen.
re enveloped by a radiance, rosy as the broad ray had been, but fainter, like the afterglow of a sunset. By this light I could make out, vaguely, our surroundings. We seemed to be on a plateau; a great flat space probably an acre in extent, surrounded by a six-foot wall. Behind us there was a wide gateway through which our airplane had just come and across which workmen were dropping bars made of some material like cement. Before us, dotting this acre or so of plateau, were small, domed structures made of the same cement-like material. In the center of the plateau rose a larger domed building with a segment of its roof open to the stars and through this opening I could see the shadowy suggestion of a great lamp. There was the source of that powerful magnetic ray!
Foulet and Brice scrambled out and stood beside me. They said never a word, but I knew that every sense was alert.
"If you will follow me," that same cold, expressionless voice murmured. I turned to look at the man. He was not bad looki