We must get to work and break some of them up.

That will not be difficult, for the wind and weather have rotted many of them half through." The stones were for the most part from two to three feet long and nine or ten inches square.

Two were laid down on the platform some eighteen inches apart and another placed across them.

The four men then lifted another stone, and holding it perpendicularly brought it down with all their strength upon the unsupported centre of the stone, which broke in half at once.

To break it again required greater efforts, but it yielded to the blows.