"I'm going to catch him," thought the lad, fiercely. "I'm going to get at the bottom of this. Why does he seem to be following us--hanging around our camp? What's he doing here? Did he take the diamond bracelet? I'm going to find out some of those things--when I catch him." He added the last with a grim smile, for, as he went on, and the snow storm increased in fury, Bart was aware that he had no easy task before him.