Roberts next studied the ground just back of the point of rocks. The soil here was of disintegrated granite, so that there were no footprints to betray anybody who might have been hidden there. But Jack picked up something that was in its way as decisive as what he had been seeking. It was a cartridge that had been ejected from a '73[1] rifle. The harmless bit of metal in his hand was the receptacle from which death had flashed across the open toward Ford Wadley.
At the foot of the rim-rock the Ranger found signs where horses had been left. He could not at first make sure whether there were three or four. From that spot he back-tracked for miles along the edge of the rim-rock till he came to the night-camp where Wadley had met the outlaws. This, too, he studied for a long time.
He had learned a good deal, but he did not know why Ford Wadley had been shot. The young fellow had not been in Texas more than six or eight months, and he could not have made many enemies. If he had nothing about him worth stealing--and in West Texas men were not in the habit of carrying valuables--the object could not have been robbery.
He rode back to Battle Butte and carried to town with him the body of the murdered man. There he heard two bits of news, either of which might serve as a cause for the murder: Young Wadley had quarreled with Tony Alviro at a dance and grossly insulted him; Arthur Ridley had been robbed of six thousand dollars by masked men while on his way to Tascosa.
Ranger Roberts decided that he would like to have a talk with Tony.
[Footnote 1: The '73 rifle was not a seventy-three-caliber weapon, but was named from the year it was got out. Its cartridges could be used for a forty-four revolver.]