“‘Well, well,’ Joe exclaimed; ‘earn your fifty, that is all. Show that you remember where you were on the night of’—and with an admirable show of indifference he pretended to consult the paper between them—‘the seventeenth of July, 1851, and I shall be satisfied.’ “‘I was at the club for one thing,’ said Mr. T——; ‘then I went to see a lady friend, where I stayed till eleven. She wore a blue muslin—— What is that?’ “I had betrayed myself by a quick movement which sent a glass tumbler crashing to the floor. Helen Zabriskie had worn a blue muslin on that same night. I had noted it when I stood on the balcony watching her and her husband. “‘That noise?’ It was Joe who was speaking. ‘You don’t know Reuben as well as I do or you wouldn’t ask. It is his practice, I am sorry to say, to accentuate his pleasure in draining my bottles, by dropping a glass at every third one.’ “Mr. T—— went on. “‘She was a married woman and I thought she loved me; but—and this is the greatest proof I can offer you that I am giving you a true account of that night—she had not had the slightest idea of the extent of my passion, and only consented to see me at all because she thought, poor thing, that a word from her would set me straight, and rid her of attentions that were fast becoming obnoxious. A sorry figure for a fellow to cut who has not been without his triumphs; but you caught me on the most detestable date in my calendar, and——’ “There is where he stopped being interesting, so I will not waste time by quoting further. And now what reply shall I make when Joe Smithers asks me double his usual price, as he will be sure to do, next time? Has he not earned an advance? I really think so. * * * * * “I have spent the whole day in weaving together the facts I have gleaned, and the suspicions I have formed, into a consecutive whole likely to present my theory in a favorable light to my superiors. But just as I thought myself in shape to meet their inquiries, I received an immediate summons into their presence, where I was given a duty to perform of so extraordinary and unexpected a nature, that it effectually drove from my mind all my own plans for the elucidation of the Zabriskie mystery. “This was nothing more nor less than to take charge of a party of people who were going to the Jersey heights for the purpose of testing Dr. Zabriskie’s skill with a pistol.” III.