only a day apart!"

Rock picked up the telephone and barked out orders. Within half an hour,
several carloads of troopers were covering the outlying roads that
converged on Shopton. Firemen and Chief Slater's town police force were
also pressed into action. They would search every cellar in town for
signs of recent digging.

Bud rode in one police car and Tom in another as a house-to-house search
was conducted along the highway that ran past Enterprises.

At one weather-beaten house, where Bud stopped with a state trooper, an
old man came to the door.

"What you fellers prowlin' around for?" he asked.

"Bomb emergency," the trooper said laconically. "We have orders to
search every house cellar for underground openings."

Grumbling, the old man let them enter. He followed them down a rickety
stairway. A moment later Bud stumbled and gave a yell. The trooper swung
around just in time to see Bud drop from view!




CHAPTER V

SECRET CACHE