He learned afterwards that this was true from the men who had surrendered.

The Jasper B.had been abandoned for so long, and was so completely abandoned except for the visits of Cap'n Abernethy, who fished from it now and then, that Loge had conceived the idea of making it the back-door, so to speak, of Morris's.

In the event of a raid upon Morris's his "get-away" through the hulk was provided for.

He had intended buying the ship himself; but Cleggett had forestalled him.
From the prisoners Cleggett also learned later that two men had been concerned in the explosion which had broken the big rocks on the plain.
One of them had won the Claiborne signet ring at poker after Reginald Maltravers had been stripped of his valuables, and had worn it.

They had been dispatched with a bomb each, which they were to introduce into the hold of the Jasper B., retiring through the tunnel after they had started the clockwork mechanism going.