"They're getting out!" Frank Hardy shouted. He pointed to the huge opening in the wall, through which the car had disappeared.
With the police at his heels, he headed down the passage. It was wider than the one through which they had entered, and the rocky floor gave way to earth, in which ruts were clearly visible.
Ahead of them they heard a shot, then more yells.
"Joe and his men are on the job," Frank reflected.
He was right. They reached the mouth of the passage, and there they came upon a large touring car. Two men were standing up in the front seat, arms upraised, and in the glare of the headlights they could see Joe and the three officers pointing their weapons at the pair.
The round-up was soon over. One of the policemen scrambled into the automobile and clapped handcuffs on the two men. The trooper, standing on the running board, turned a flashlight upon them.
The surly features of Gus Montrose were revealed. The other man was his companion, Sam.
"All out!" snapped the officer, urging the crestfallen thieves out of the car.
They stepped out sullenly.
"Well, here's four of 'em, anyway!" declared the trooper. He turned to Frank. "Do you think there are any more?"