“Well, sir, it will be very easy,” said Bigley eagerly.

“Not so easy,” said my father. “We shall want a couple of men who can dive.”

“Oh no, you will not, sir,” replied Bigley. “I have thought it all out. All we shall want will be a clear day with the sea smooth.”

“Yes, highly necessary, Bigley,” said my father.

“Then we should want a very long smooth pole, and if we could not get one long enough two poles would have to be fished together.”

“And then you’d fish for the boxes?” I said.

“No,” said Bigley seriously; “you would have to sink the pole just down to where the chests lie, and rig up a block at the top, run a rope through it, hold one end of the rope in the boat to which the pole is made fast, and at the other end have a thick strong bag made of net.”

“Well, what then?” said my father.

“Why, then you would put a big pig of lead in the bag, let me take hold of the bag, let the rope run slack, and I should go down to the bottom in an instant. Then I should lift a box into the net-bag and come up, leaving it there for you in the boat to haul it up.”

“Yes, that sounds very simple,” said my father; “but could you do it?”