"There you see," the silversmith said, "even if they discovered the trap-door and broke up the floor with sledgehammers, which would be no easy matter, and probed the stream with lances, they would find nothing. As you saw, there is a chain to the end of the last box, which is, as it were, an anchor to the rest; this chain Jacques will now attach to a strong wire, and fasten that to a ring below the water's edge, and a foot beyond the trap-door, so that when danger is past we shall haul up the chain and recover the cases one by one in the order in which they have been sent down."