He could not get away from Platzoff till close upon midnight. When he got to his own room he bolted the door, and drew the curtains across the windows, although he knew that it was impossible for any one to spy on him from without. Then he opened his desk, spread out the MS. before him, and took up the volume. A calf-bound volume with red edges, and numbering five hundred pages. It was in English, and the title-page stated it to be "The Confessions of Parthenio the Mystic: a Romance. Translated from the Latin. With Annotations, and a Key to Sundrie Dark Meanings. Imprinted at Amsterdam in he Year of Grace 1698." It was in excellent condition. Captain Ducie's eagerness to test his prize would not allow of more than a very cursory inspection of the general contents of the volume. So far as he could make out it seemed to be a political satire veiled under the transparent garb of an Eastern story. Parthenio was represented as a holy man--a Spiritualist or Mystic--who had lived for many years in a cave in one of the Arabian deserts. Commanded at length by what he calls the "inner voice," he sets out on his travels to visit sundry courts and kingdoms of the East. He returns after five years, and writes, for the benefit of his disciples, an account of the chief things he has seen and learned while on his travels. The courts of England, France, and Spain, under fictitious names, are the chief marks for his ponderous satire, and some of the greatest men in the three kingdoms are lashed with his most scurrilous abuse. Under any circumstances the book was not one that Captain Ducie would have cared to wade through, and in the present case, after dipping into a page here and there, and finding that it contained nothing likely to interest him, he proceeded at once to the more serious business of the evening. The clocks of Bon Repos were striking midnight as Captain Ducie proceeded to test the value of the first group of figures on the MS., according to the formula laid down for him by his friend Bexell. The first group of figures was 253.12/4. Turning to page two hundred and fifty-three of the Confessions, and counting from the top of that page, he found that the fourth word of the twelfth line gave him _you_. The second clump of figures was 59.25/1. The first word of the twenty-fifth line of page fifty-nine gave him _will_. The third clump of figures gave him _have_, and the fourth _gathered_. These four words ranged in order read: _You will have gathered_. Such a sequence of words could not arise from mere accident. When he had got thus far Ducie knew that Platzoff's secret would soon be a secret no longer, that in a very little while the heart of the mystery would be laid bare. Encouraged by his success, Ducie went to work with renewed vigour, and before the clock struck one he had completed the first sentence of the MS., which ran as under:--