The bait in the trap of the average blackmailing plant is a woman--a young woman, good-looking, well groomed and smart. It is with her that the quarry is compromisingly entangled. But against women confederates Chappy Marr had a strong prejudice. They were such uncertain quantities; you never could depend upon them. They were emotional, temperamental; they let their sentimental attachments run away with their judgment; they fell in love, which was bad; they talked too much, which was worse; they were fickle-minded and jealous; they were given to falling out with male pals, and they had been known to carry a jealous grudge to the point of turning informer. So he set his inventions to the task of evolving a blackmailing snare which might be set and sprung, and afterwards dismantled and hidden away without the intervention of the female knave of the species in any of its stages. Trust him--smooth as lubricating oil, a veritable human graphite--to turn the trick. He turned it. The upshot was a lovely thing, almost foolproof and practically cop-proof. To be sure, a woman figured in it, but her part was that of the chosen prey, not the part of an accessory and accomplice. The greater simplicity of the device was attested by the fact that for its mounting, from beginning to end, only three active performers were needed. The chief role he would play. For his main supporting cast he needed two men, and knew moreover exactly where to find them. Of these two only one would show ever upon the stage. The other would bide out of sight behind the scenes, doing his share of the work, unsuspected, from under cover. For the part which he intended her to take in his production--the part of dupe--Mrs. Justus Propbridge was, as one might say, made to order. Consider her qualifications: young, pretty, impressionable, vain and inexperienced; the second wife of a man who even in these times of suddenly inflated fortunes was reckoned to be rich; newly come out of the boundless West, bringing a bounding social ambition with her; spending money freely and having plenty more at command to spend when the present supply was gone; her name appearing frequently in those newspapers and those weekly and monthly magazines catering particularly to the so-called smart set, which is so called, one gathers, because it is not a set and is not particularly smart.