The major gave me a quick look. “I thought you considered Miss Tuttle the guilty one.” I felt that the time had come to show my colors. “I have changed my mind,” said I. “I can give you no good reason for this; something in the woman herself, I suppose. She does not look nor act like a criminal. While not desirous of raising myself in opposition to the judgment of those so greatly my superior in all respects, I have had this feeling, and I am courageous enough to avow it. And yet, if Mr. Jeffrey could not have left the cemetery gates and reached the Moore house in time to fulfil all the conditions of this tragedy, the case does look black against the woman. She admits to having been there when the pistol was fired, unless—” “Unless what? You have something new to tell us. That I have seen ever since you entered the room. What is it?” I cast a glance at the door. Should I be able to finish my story before Durbin returned? I thought it possible, and, though still upset by this new evidence, which I could now see was not entirely in Miss Tuttle’s favor, I spoke up with what spirit I might. “I have just come from spending another night in the Moore house. All the efforts heretofore made to exhaust its secrets have been founded upon a theory that has brought us nowhere. I had another in mind, and I was anxious to test it before resting from all further attempt to solve this riddle. And it has not failed me. By pursuing a clue apparently so trivial that I allowed it to go neglected for weeks, I have come upon the key to the many mysterious crimes which have defiled the library hearthstone. And where do you think it lies? Not in the hearthstone itself and not in the floor under the settle; not, in fact, in the library at all, but in the picture hanging upstairs in the southwest chamber.” “The picture! that faded-out sketch, fit only for the garret?” “Yes. To you and to most people surveying it, it is just what you say and nothing more. But to the initiated few—pray Heaven they may have been few—it is writing, conveying secret instructions. The whole combination of curves which go to make up this sketch is a curious arrangement of words inscribed with the utmost care, in the smallest of characters. Viewed with a magnifying glass, the uncertain outlines of a shadowy face surmounted by a mass of piled-up hair resolve themselves into lines of writing, the words of which are quite intelligible and full of grim and unmistakable purpose. I have read those lines; and what is more, I have transcribed them into plain copy. Will you read them? They contain a most extraordinary confession; a confession that was manifestly intended as a warning, but which unfortunately has had very different results. It may explain the death of the man from Denver, even if it cast no light upon the other inexplicable features of the remarkable case we are considering.”