searchlight had been turned on from the
top of the truck full in the faces of the robbers. They staggered as
though they had been struck, and at the same instant there came a volley
of shots and the police were upon the hold-up men.

There was a wild melee of struggling men, as they swayed back and
forth in a desperate struggle. The robbers had been taken completely by
surprise and were outnumbered two to one. There were shouts and the
crack of revolvers, and the thud of pistol butts.

But the battle, though fierce, was of short duration. In a few minutes
the robbers had been subdued. One lay stunned on the bridge and another
lay by him wounded. Two more were held in the grasp of officers.

One, however, tore himself away from the officer who had grappled with
him, and came rushing in the direction of the radio boys. In the glare
from the searchlight they recognized Cassey.

He saw them, too, and fired his revolver at them. The shot went wild. He
pressed the trigger again but with no result. Then, realizing that his
weapon was empty, he hurled it at Bob, who was nearest to him.

Bob dodged, and the next instant grabbed at Cassey's legs. The
expertness that had made him the star of his football team stood him in
good stead. His arms closed round Cassey in a flying tackle, and they
came heavily to the bridge together.

Cassey struggled desperately to rise, but Bob held him in an unbreakable
grip, and a second later his comrades had come to his assistance and the
scoundrel was overpowered and delivered over to the police, who came
rushing up.

The robbers were securely bound and bundled into the auto truck that
they had planned to rob. Then in high spirits the party drove back to
Barberton. The chief was jubilant, and the praises he heaped upon the
radio boys made their ears burn. They stayed long enough at his office
to see the prisoners safely jailed and then, though the hour was late,
rode back to their quarters in the woods with Mr. Brandon.

They slept long and late after their exciting experience, and it was
almost noon the next day when they awoke. Bob was somewhat surprised to
find a letter waiting for him. It bore no stamp, and had evidently been
brought there by one of the lumbermen.

He opened it curiously and glanced at the signature. Then he gave a
shout that brought his comrades quickly to his side.

"What do you think of this, fellows?" he cried. "Buck Looker's writing
to me."

There was a choru