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40 powder, you may be certain he has yet to return to the library, and that by waiting, you will have the long-wished-for opportunity of seeing him."

And pausing for no reply, my strange companion suddenly thrust a mask into my hand and darted from the circle of trees that surrounded us.

For a moment I stood dumbfounded at the position in which my recklessness had placed me. All the folly, the impertinence even, of the proceeding upon which I had entered, was revealed to me in its true colors, and I mentally inquired what could have induced me to thus hamper myself with the details of a mystery so entirely removed from the serious matter I had in charge. Resolved to abandon the affair, I made a hasty attempt to disengage myself from the domino in which I had been so unceremoniously enveloped. But invisible hands seemed to restrain me. A vivid remembrance of the tone in which these final instructions had been uttered returned to my mind, and while I recognized the voice as that of Hartley Benson, I also recognized the almost saturnine intensity of expression which had once before imbued his