It was a suspicion of the Bradys that the mysterious box would be shipped out of the city by rail, that led them to see if the wagon had gone to the depot.
They did not find the box in the baggage room.
But they learned that a man answering Solomon Gloom's description had checked it through to Savannah, Georgia, and it had been sent over the river and was put in the baggage car.
"How soon does that train leave?" asked Harry, quickly.
"The connecting boat goes in three minutes, sir," replied the porter, glancing at his watch.
"Old King Brady, we must go out on that train," said the boy, quickly. "It's our only chance to find out what's in that box."
"Run for the ticket office, then," said the veteran, promptly. "Mr. Gloom is evidently going out on the train with it. If there's any crooked work going on here we may be able to arrest him."
They rushed to the office, procured tickets, and just had time to jump aboard the boat as it pulled out of the slip.
Reaching the Jersey side, they boarded the train.
Seeing nothing of Mr. Gloom in that car, they sat down to map out a course of action, as everything had hitherto been done on the spur of the moment.