side it, and the difference in size satisfied him beyond all doubt that he had not made that suspicious track himself. There were hob-nails in the track, and that proved that none of Roy's party could have stepped in that particular spot, for there were no nails of that sort in their foot-gear.
"This rock was put here for a purpose," said Roy; and when the thought passed through his mind the cold chills crept all over him. "There must have been a good many of them in the gang, for half a dozen men couldn't roll so heavy a weight out of the ditch unless they had something to work with. What's this and this, and those pieces of timber over there?"
The longer the boy continued his investigations, the more he found to confirm the alarming suspicions that had arisen in his mind. The objects that now attracted his notice were several pieces of round wood, with the bark scratched and torn from them, and as many sticks of timber that were likewise covered with wounds and abrasions. There were other large foot-prints too in abundance—in
