"Just the same, I wasn't ready to give it up. I knew, right in my bones, that old Mr. Thaneford had wanted to tell me something of supreme importance at that last moment on his deathbed, when my hand lay in his and I could feel the intermittent pressure of his fingers. It was impossible that I should be mistaken about any of the figures, for he went over the series three or four times; besides, they did open the safe. "I was still sure that the numbers meant something more than the mere combination to an old strong-box that held nothing of any pecuniary value. The real secret lay between the covers of that leather-bound book, and I was certain that the old man had been desirous that I should discover it. The Thanefords and the Hildebrands had not been friends for a long while, although nobody knew just why. Probably, it was some ancient grudge Or unforgiven wrong, and old Mr. Thaneford had done his part in keeping it up. But now that he was sick and paralyzed and dying, and especially since he and I had become friends of a sort, he was willing to bury the hatchet. So he told all he could--you remember that he couldn't speak--and he seemed to feel satisfied that I would find the hint sufficient, that I would be clever enough to solve the puzzle. "And surely it was a puzzle. My best guess had come a flivver, and I didn't see how I could go a step further. Perhaps it was silly to attach so much importance to what the old man had tried to tell me, but I had an intuition that our future happiness and safety were bound up in those crumbling leather covers. "Time went on, and the solution was as far off as ever; at least apparently. Little Hugh and I had come to Irvington for the winter; it was close to Christmas, and I had the blues terribly. Just to think of Christmas and that abyss lying between us! For I knew that you would not come unless I called, and I could not send for you quite yet. Suppose that the discovery of the secret should be close at hand; I might need Chalmers to help out on some difficult scientific point. "It is always the little things that show the way out. Hilda's weekly letter had come, and I was reading it eagerly hoping to find some mention of you. Now Hilda, poor dear! is an awful speller; she never could learn to visualize words. As I read along I came on a word which looked odd; then I saw that she had committed the careless stenographer's error of spelling 'forty' with an u, thus: 'fourty.' Of course, the pronunciation is the same in either case--and then it was that I got my _big_ idea. Was it possible that the phonetic sounds in my series of numbers might fit words of entirely different meaning than their ordinary equivalents in letters? Let me try.