Dantes went and cut the strongest olive-tree he could find, stripped off its branches, inserted it in the hole, and used it as a lever. But the rock was too heavy, and too firmly wedged, to be moved by any one man, were he Hercules himself. Dantes saw that he must attack the wedge. But how? He cast his eyes around, and saw the horn full of powder which his friend Jacopo had left him.