He was gone but a moment, and when he came out of the bushes, he was dragging after him--not a grizzly bear, but a large gray wolf, which had been overpowered and killed by the dogs.

One of the wolf's hind-legs was caught in a trap, to which was fastened a short piece of chain and a clog.

The animal had doubtless been paying his respects to some sheep-fold during the night, and had put his foot into the trap while searching for his supper.

He had retreated toward the mountains, and had dragged the trap until the clog caught, and held him fast.

That was the reason he did not run off when the boys came up, and the commotion in the bushes had been caused by his efforts to free himself.
While the boys were examining their prize, Johnny, having succeeded in stopping his frantic horse, was returning to the place from which he had started on his involuntary ride.