While Alan talked, Jack's gaze drifted through the window to the flock of sheep that were being driven up from the ditch by Lee and Norris. That little pastoral scene had its significance for him. He had arrived at the locality of the hold-up a few minutes after they had left, and his keen intelligence had taken in some of the points they had observed. A rapid circuit of the spot at the distance of thirty yards had shown him no tracks leading from the place except those which ran up the lateral on either side of it. It was possible that these belonged to the horses of the robbers, but if so the fellows were singularly careless of detection. Moreover, the booty must be accounted for. They had not carried it with them, since no empty box remained to show that they had poured the gold into sacks, and it would have been impossible to take the box as it was on a horse. Nor had they buried it, unless at the bottom of the irrigating ditch, for some signs of their work must have remained. Balancing probabilities, it had seemed to Flatray that these might be the tracks of ranchmen who had arrived after the hold-up and were following the escaping bandits up the lateral. For unless these were the robber's, there was no way of escape except either up or down the bottom of the ditch. His search had eliminated the possibility of any other but the road, and this was travelled too frequently to admit of even a chance of escape by it without detection. Jack filed away one or two questions in his brain for future reference. The most important of these was to discover whether there had been any water in the ditch at the time of the hold-up. He had decided to follow the tracks leading up the ditch and found no difficulty in doing so at a fast walk. Without any hesitation they paralleled the edge of the lateral. Nor had the deputy travelled a quarter of a mile before he made a discovery. The rider on the right hand side of the stream had been chewing tobacco, and he had a habit of splashing his mark on boulders he passed in the form of tobacco juice. Half a dozen times before he reached the Lee ranch the ranger saw this signature of identity writ large on smooth rocks shining in the sun. The last place he saw it was at the point where the two riders deflected from the lateral toward the ranch house, following tracks which led up from the bottom of the ditch. An instant later Flatray had dodged back into the chaparral, for somebody was driving a flock of sheep down to the ditch. He made out that there were two riders behind them, and that they had no dog. For the present his curiosity was satisfied. He thought he knew why they were watering sheep in this odd fashion. Swiftly he had made a circuit, drawn rein in front of the store, and dropped in just in time to hear his name. Now, as with one ear he listened to Alan's account of the hold-up, with his subconscious mind he was with the sheep-herders who were driving the flock back into the pasture.