Eh, Reade ?" "It sounds good," nodded Tom.

"I'll take a chance on it, Dick, with you to engineer the job." In ten minutes Officer Hemingway was back.

He stepped into a cupboard close to the counter, prepared for the coming of Tripps.
Half an hour later the police station's officer in charge telephoned that Dr.Thornton had carefully opened the box, and had declared that it contained four pounds of nitroglycerine.

Nor had Dr.
Thornton taken any chances of mistake.

He had taken a minute quantity of the suspected stuff out in the yard back of the station house, and had exploded it.
At a moment when the office was empty of patrons Mr.Drowan stepped into the cupboard for a moment, as though searching for something.
"How late do you stay open ?" whispered Hemingway.
"Ten o'clock, usually, on Saturday nights, but we'll keep open as late as you want, officer." "Better keep open until midnight, then." So they did, Dick telephoning his parents at the store to explain that he was at the express office helping Dave.
Midnight came and went.