its purpose is twofold. We, as well, as the police, have often need of analysis. We make it. If we require a drug, a poison, say, we compound it from its various ingredients, or, as the case may be, distil it, perhaps—it is, you will agree, somewhat more difficult to trace to its source if procured that way. And speaking of poisons"—he stepped forward, and lifted a glass-stoppered bottle containing a colourless liquid from a shelf—"in a modest way we have even done some original research work here. This, for instance, is as Utopian from our standpoint as the formation and personnel of the organisation I have briefly outlined to you. It possesses very essential qualities. It is almost instantaneous in its action, requires a very small quantity, and defies detection even by autopsy." He uncorked the bottle, and dipped in a long glass rod. "Will you watch the experiment?" he invited, with a sort of ghastly pleasantry. "I do not want you to accept anything on trust."
With a start, Jimmie Dale swung around. He had heard no sound, but another man was at his elbow now—and, struggling in the man's hand, was a little white rabbit.
It was over in an instant. A single drop in the rabbit's mouth, and the animal had stiffened out, a lifeless thing.
"It is quite as effective on the human organism," continued the other, "only, instead of one drop, three are required. If I make it ten"—he was carefully measuring the liquid into two wineglasses—"it is only that even you may be satisfied that the quantity is fatal." He filled up the glasses with what was apparently wine of some description, which he poured from a decanter, and held out the glasses in front of him.
And again Jimmie Dale started, again he had heard no one enter, and yet two men had stepped forward from behind him and had taken the glasses from their leader's hands. He glanced around him, counting quickly—they were surely the two who had entered with him from the corridor. No! Including the leader, there were now six men, all in evening dress, all masked, in the room with him.
A wave of the leader's hand, and the two men carrying
