We have only to push the points of the irons up, between the beams and the planks, and use them as levers.

The nails will be strong, indeed, if those irons, with two of us at each, would not wrench them out." The young men all leapt to their feet, pains and aches quite forgotten in the excitement of this unexpected news, and six of them seized hold of the irons.
"Gently!" Francis said.

"You must remember, there may be people going down there at present, getting up stores.

Before we venture to disturb a plank, we must make the hole sufficiently large for us to spy through.

This will be a very easy affair, in comparison with making a hole large enough for a saw to go through.