But on the day of the picnic they had met and quarreled. Rad had charged him with the robbery and they had parted in a high state of anger. This would explain Rad's actions in the hotel, his white face later when I found him in the summer house. And Jeff, still quivering from the boy's accusation, had gone back into the cave and met his father as the old man was coming from the little gallery of the broken column with Polly Mathers's coat. What had happened there I did not like to consider; they both had uncontrolled tempers, and in the past there had been wrongs on both sides. Probably Jeff's blow had been harder than he meant. In the evening when Mattison and I brought the news of the murder, Rad must have known instantly who was the real culprit. That was why he had kept silent; that was why he so vehemently insisted on Mose's innocence. I had found the light at last--though the darkness had been almost better. What must I do? I asked myself. Was it my duty to search out Jefferson and convict him of this crime? No one could tell what provocation he may have had. Why not let matters take their course? There was nothing but circumstantial evidence against Radnor. Surely no jury would convict him on that. I could work up a sufficient case against Mose to assure his acquittal. He would be released with a blot on his name, he would be regarded for the rest of his life with suspicion; but in any event there seemed to be no outcome which would not involve the family in endless trouble and disgrace. And besides, if he himself elected to be silent, had I any right to speak? Then I pulled myself together. Yes, it was not only right for me to speak; it was my duty. Rad should not be allowed to sacrifice himself. The truth, at whatever cost, must be brought out. My first move must be to discover Jeff's whereabouts on the day of his father's murder. It ought not to be difficult to trace a man who had come more than once under the surveillance of the police. Having made up my mind as to the necessary course, I lost no time in putting it into action. I barely waited to snatch a hasty supper before riding back to the village. From there I sent a fifty-word telegram to the chief of police in Seattle asking for any information as to the whereabouts of Jefferson Gaylord on the nineteenth of May. It was ten o'clock the next morning before an answer came. So sure was I of what it was going to contain, that I read the words twice before comprehending them. "Jefferson Gaylord spent May nineteenth in lumber camp thirty miles from Seattle. Well-known character. Mistaken identity impossible. "HENRY WATERSON, "_Police Commissioner_."