This book was uploaded to the Library as a PRC format ten years ago. I have rebuilt it, with the original cover, the frontispiece, and reinstated many missing format details such as italics, and diacritical characters. There was also a grid table in the original hard-back book which wasn't optimally rendered for e-readers, and which is now a jpeg, which will therefore retain its layout. This book isnow available in epub, azw3 and mobi format, and I have identified it as v2.
It was directly followed by "The Panama Plot" (1918)
1: The Treasure-Train
2: The Truth Detector
3: The Soul-Analysis
4: The Mystic Poisoner
5: The Phantom Destroyer
6: The Beauty Mask
7: The Love Meter
8: The Vital Principle
9: The Rubber Dagger
10: The Submarine Mine
11: The Gun-Runner
12: The Sunken Treasure
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