The trap-door was now raised, and Guy to his astonishment saw a stream of running water three feet below the opening.
"Whence comes this?" he asked in astonishment.
"No wonder you are surprised," the silversmith said; "it was a piece of rare good-luck that my father hit upon it. A map that he had showed him that in the old days, before there were any houses on this side of the river, a narrow branch left the stream some hundred yards above the position of his house, made a circuit and came into it again as much below. He inquired among some old men, and learned that they had heard their grandfathers say that they knew that at some time or other this stream had been built over when Paris began to grow in this direction. After he had contrived this apparatus that you see, which is worked by a heavy counterpoise in the wall, he began to dig, and a foot below the surface came upon an arch of brickwork, so my father concluded that his house was exactly over the old stream.
"On breaking through the crown he discovered, as you see, that the water still flowed through this tunnel, which is some three and a half yards wide and eight feet deep. My men, all of whom are trusty fellows, know of the existence of this hiding-place, but Jacques is the only one besides myself who knows the secret of the opening. Now, Jacques, fetch the chests along as fast as they are ready."
The chests were soon brought up and one by one lowered. Chains were attached from the handle of each to that of the one that followed; they were almost the weight of the water and sank until within an inch-or two of the surface. Each was floated down as it was lowered, until twenty great chests had been taken down. Then one more heavy and ponderous than the rest was attached to the train, and a sloping board being placed from the cellar floor to the bottom of the stream, the case was allowed to slide down this until it rested on the bottom several feet beyond the trap-door.
"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."
As soon as Jacques had fastened the wire to the ring he touched another heavy spring under the sill, then pulled hard on the trap-door; this gradually began to sink, and in a minute was in its place again. At the same time the brick that had been pushed in above came out into its place again, dust was then swept into the crack at the edge of the trapdoor, and no one who had not seen the latter raised would have dreamt of its existence.