“This is more unfortunate than I expected,” said Crowther. “I always said to myself, 'Well, in his private correspondence, in the close relations of friendship, we shall come upon some clew to the mystery.' I always understood that with you he was frankness itself, sir?”

“So he was,” rejoined MacNaghten.

“This reserve is therefore the more remarkable still. Can you account for it in any way, sir?”

“Why should I account for it?” cried Dan, passionately. “My friend had his own reasons for whatever he did,—good and sufficient ones, I 'll be sworn.”

“I feel assured of that, sir; don't mistake me for a moment, or suppose I am impugning them. I merely desired to learn if you could, from your intimate knowledge of your friend's character, trace this reserve on his part to any distinct cause.”

“My knowledge of him goes this far,” said MacNaghten, haughtily, “that he had an honorable motive for every aet of his life.”

It required some address on Crowther's part to bring back MacNaghten to that calm and deliberate tone of mind which the subject demanded. After a while, however, he perfectly succeeded; and Dan arose, and accompanied him to the library, where they both proceeded to search among my father's papers, with which several boxes were filled.

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CHAPTER XVIII. DISAPPOINTMENTS

The search for any document that could authenticate my father's marriage proved totally unsuccessful, and although poor MacNaghten's zeal was untiring and unwearied, all his efforts were fruitless.