"We pieced it out, got our bearings, and they're spreading the net to catch some pretty big fish." "What of Grizzly and that fellow with him?" "Sloped. Adair is after them, though. See here, you get right home and into your cozy." "But I have something of possible importance to tell the superintendent." "He's gone down the line hot-footed. It will all keep till he calls you up. Left instructions to that effect--'30,' now, and be quick about it!" "30" it was, perforce. Ralph had gone through a rough night of it. He was pretty well tired out and glad to get to bed. He went there, however, with some exciting thoughts in his mind. There had been no solution to the enigma of the piece of broken box cover flung from the passing freight train through the window of the little station. All Ralph could do about that incident was to conjecture blindly. It was a queer happening, a suggestive one. Ralph had a fertile imagination. There was a coincidence about the discovery of the queer message, and things hinged together in a way. Contiguous to that section the chicken farm was located, and Glen Palmer, at least his grandfather, had seemingly linked up with the conspirators against the welfare of the Great Northern road once or twice before. Ralph could not conceive why that message had been written. It was a new mystery, but it had come so secretly upon the heels of a bigger and more important one, that there was neither time nor opportunity to explore it just at present. Mrs. Fairbanks, like the true anxious mother that she was, greeted Ralph on his arrival at home. She had not gone to bed all night, and she now insisted on his eating an early breakfast and taking a needed rest. Tired out as he was, however, once alone in his own room Ralph took this, the first quiet opportunity, to look over the memorandum book that had fallen from the coat pocket of the train wrecker. Ralph's eyes expanded and he uttered one or two subdued whistles of astonishment as he delved among the contents of his find. Some penciled notes and a letter in the memorandum book told a great deal--in fact, so much and so clearly and unmistakably, that Ralph could hardly go to sleep thinking over the importance of his discoveries. They had to wait, however, till he could again see the superintendent. Now, as Ralph was roused up out of sleep by a telephone call from that very official, his active mind was again filled with the theme of the memorandum book and what it had revealed to him. When he got down stairs Ralph found that word had come for him to report to the office of the road as promptly as possible. His mother had an appetizing lunch spread on the dining room table, and the lad did full justice to it.