"Maybe it fitted that skull that used to be in the cupboard upstairs, sir," he said. "Maybe Dr. Pratt had put the skull into the lime to clean it, or something, and when he took it out he left the lower jaw behind. There's some human hair sticking in the lime, sir." I saw there was, and that was what Trehearn said. If he did not suspect something, why in the world should he have suggested that the jaw might fit the skull? Besides, it did. That's proof that he knows more than he cares to tell. Do you suppose he looked before she was buried? Or perhaps--when he buried Luke in the same grave---- Well, well, it's of no use to go over that, is it? I said I would keep the jaw with the skull, and I took it upstairs and fitted it into its place. There's not the slightest doubt about the two belonging together, and together they are. Trehearn knows several things. We were talking about plastering the kitchen a while ago, and he happened to remember that it had not been done since the very week when Mrs. Pratt died. He did not say that the mason must have left some lime on the place, but he thought it, and that it was the very same lime he had found in the asparagus pit. He knows a lot. Trehearn is one of your silent beggars who can put two and two together. That grave is very near the back of his cottage, too, and he's one of the quickest men with a spade I ever saw. If he wanted to know the truth, he could, and no one else would ever be the wiser unless he chose to tell. In a quiet village like ours, people don't go and spend the night in the churchyard to see whether the sexton potters about by himself between ten o'clock and daylight. What is awful to think of, is Luke's deliberation, if he did it; his cool certainty that no one would find him out; above all, his nerve, for that must have been extraordinary. I sometimes think it's bad enough to live in the place where it was done, if it really was done. I always put in the condition, you see, for the sake of his memory, and a little bit for my own sake, too. I'll go upstairs and fetch the box in a minute. Let me light my pipe; there's no hurry! We had supper early, and it's only half-past nine o'clock. I never let a friend go to bed before twelve, or with less than three glasses--you may have as many more as you like, but you shan't have less, for the sake of old times. It's breezing up again, do you hear? That was only a lull just now, and we are going to have a bad night.