just as the machine reached the other side, the bridge went down with a crash.
"Look out!" yelled Dick, and the warning came none too soon, for both he and Tom were almost on the bridge. They turned their horses just in time, came to a sudden halt in some bushes, and stared blankly at each other.
"Gone!" cried Tom, hollowly. "Oh, what luck!"
"Quick, your pistol, Tom!" cried Dick, suddenly.
"But the girls" began the other.
"Don't shoot at the car, shoot at the tires,'* explained Dick. And then he whipped out his own weapon, got into range, and began to blaze away. Each of the boys fired three shots. One hit the back lamp of the automobile, smashing the red glass, and another hit the differential case and glanced off. But the wheels remained untouched, and in a few seconds the big touring car was out of sight around a bend. The lads heard a scream from the two girls, and then all that reached their strained ears was the sound of the motor, growing fainter and fainter, until it died out altogether.
Dick and Tom felt sick at heart. They had been so near to rescuing the girls, and now they
