As the lad started forward his horse followed him, so well trained was
Sunger.

"No; stay back, old fellow!" Jack exclaimed. The pony, whinnying, obeyed. Jack noticed that one of the mail bags was hanging loose, as if about to fall, but he reasoned that he could fasten that securely after he had learned whether or not the white object was the package missing from his pocket.

Cautiously he approached, and there, lying on the very verge of one of the openings made by the missing planks, was the packet, which Jack was sure contained jewelry, if not money.

"Well, if this isn't lucky!" he cried, as he picked it up, and thrust it into the bottom of his inside vest pocket. "Just pure luck! You won't get out again," he added, patting the package.

It was the work of but a few minutes to drag from the nearby woods some big branches to fill in the holes left by the missing planks. Of course, the branches did not make the bridge secure, but they could easily be seen, even after the moon went down, and would warn chance passersby of the danger. There was a chance that some one might come after Jack passed, though the pony express trail was one not often followed after nightfall.

Jack tried to ascertain by careful looking how the planks had come to give way under the hoofs of his steed. But there was no clew that he could discover. The bridge was not a carefully made one, and it would have been an easy matter for any one to so loosen a couple of the planks that the least motion would send them into the stream below.

"But who would want to do a thing like that?" Jack reasoned. "I might have been killed, and so might Sunger. Well, all's well that ends well, I guess. Now I'd better be getting along."

The bridge was as secure as Jack could make it in his haste, and having made sure that nothing was missing from the mail and express pouches, and fastening them securely, he mounted his horse again, and set off at a lively pace. For a while he was worried lest his pony might have strained a shoulder or a tendon, but Sunger appeared to be none the worse for the adventure.

Jack rode on, and had covered about half the distance to Rainbow Ridge when he heard, on the trail ahead of him, the sounds of other hoof-beats. At first he thought it might be the echo of his own, but a moment of listening told him it was some one else on the road.

"I wonder who it can be," he asked himself.