"So it does," returned Tom, and brought the automobile to a standstill. Both boys leaped out and walked forward.
To inspect the bridge in the bright moonlight was easy, and in less than a minute the boys made a startling discovery, which was to the effect that the opposite end of the structure had been thrown from its supports and was in danger of falling at any instant.
"This is mighty bad," was Sam's comment. "Why, Tom, this is positively dangerous. If anybody should come along here——"
"Hark!" Tom put up his hand, and both boys listened. From the top of the hill they had left but a moment before, came the sounds of an approaching automobile. An instant later the rays of the headlights shot into view, almost blinding them.
"We must stop them!" came from both boys simultaneously. But scarcely had the words left their lips, when they saw that such a course might be impossible. The strange automobile was coming down the hill at a furious rate. Now, as the driver saw the Rovers' machine, he sounded his horn shrilly.
"He'll have a smash-up as sure as fate!" yelled Sam, and put up his hand in warning. Tom did likewise, and also yelled at the top of his lungs.
But it was too late. The occupant of the strange automobile—for the machine carried but a single person—tried to come to a stop. The brakes groaned and squeaked, and the car swept slightly to one side, thus avoiding the Rovers' machine. Then, with power thrown off and the hand-brake set, it rolled out on the bridge. There was a snap, followed by a tremendous crash, and the next instant machine and driver disappeared with a splash into the swiftly-flowing river.
CHAPTER II
TO THE RESCUE
The accident at the bridge had occurred so suddenly that, for the instant, neither Rover boy knew what to do. They saw that the farther end of the bridge had given way completely. Just where the end rested in the water they beheld several small objects floating about, one of them evidently a cap, and another a small wooden box. But the automobile with its driver was nowhere to be seen.