"I'm with you, sir," and the search began.

It lasted close on to half an hour, when Old Spicer suddenly uttered a low exclamation of satisfaction, and Morgan at once knew he had found what he was looking for.

He at once joined the old detective, who silently pointed to a dark opening in the front foundation wall, below the level of the cellar bottom, and partially concealed by some empty barrels.

"What is it?" asked George, eagerly.

"Don't you understand?"

"By Jove, I do not."

"Well," said Old Spicer, "I can see it all as plain as day. That opening leads into an abandoned sewer, which is connected with a catch-basin at the next corner, where, undoubtedly, there is a ladder, or iron spikes are driven into the walls, by means of which those making use of this peculiar passage, enter the cellar, or reach the street."

"By thunder! this is a shrewder thing than the other."

"That's a fact; but unless we are driven to it, I prefer to use the other exit."

"So do I."