They were quite distinctive. The heel was turned out to such an extent that the track was always a narrow indentation, where the heel fell on the soft soil. He identified the same tracks in many places, and, dismissing the other tracks, the sheriff proceeded to make up a trail history for Sandersen.
Here he came up the hill, on foot. Here he paused beside the embers of the fire and remained standing for a long time, for the marks were worked in deeply. After a time the trail went—he followed it with difficulty over the hard-packed gravel—up the side of the hill to a semicircular arrangement of rocks, and there, distinct in the soil, was the impression of the body, where the cowpuncher had lain down. The sheriff lay down in turn, and at once he was sure why Sandersen had chosen this spot. He was defended perfectly on three sides from bullets, and in the meantime, through crevices in the rock, he maintained a clear outlook over the whole side of the hill.
Obviously Sandersen had lain down to keep watch. For what? For Cold Feet, of course, on whose head a price rested. Or, at least, so Sinclair must have believed at the time. The news had not yet been published abroad that Cold Feet had been exculpated by the confession of Sinclair to the killing of Quade.
So much was clear. But presently Sandersen had risen and gone down the hill again, leaving from the other side of the rock. Had he covered Cold Feet when the latter returned to his camp, having been absent when Sandersen first arrived? No, the tracks down the hill were leisurely, not the long strides which a man would make to get close to one whom he had covered with a revolver from a distance.
Reaching the shoulder of the mountain, Kern puzzled anew. He began a fresh study of the tracks. Those of Cold Feet were instantly known by the tiny size of the marks of the soles. The sheriff remembered that he had often wondered at the smallness of the schoolteacher's feet. Cold Feet was there, and Sandersen was dead. Again it seemed certain that Cold Feet had been guilty of the crime, but the sheriff kept on systematically hunting for new evidence. He found no third set of tracks for some time, but when he did find them, they were very clear—a short, broad foot, the imprint of a heavy man. A fat man, then, no doubt. From the length of the footprint it was very doubtful if the man were tall, and certainly by the clearness of the indentation, the man was heavy. The sheriff could tell by making a track beside that of the quarry.
A second possibility, therefore, had entered, and the sheriff felt a reasonable conviction that this must be the guilty man.
Now he combed the whole area for some means of identifying the third man who had been on the mountainside. But nothing had been dropped except a brilliant bandanna, wadded compactly together, which the sheriff recognized as belonging to Sandersen. There was only one definite means of recognizing the third man. Very faint in the center of the impression made by his sole, were two crossed arrows, the sign of the bootmaker.
The sheriff shook his head. Could he examine the soles of the boots of every man in the vicinity of Sour Creek, even if he limited his inquiry to those who were short and stocky? And might there not be many a man who wore the same type of boots?
He flung himself gloomily into his saddle again, and this time he headed straight down the trail for Sour Creek.
At the hotel he was surrounded by an excited knot of people who wished to know how he had extracted the amazing confession from Riley Sinclair. The sheriff tore himself away from a dozen hands who wished to buttonhole him in close conversation.