A sharp puff of wind came off the land.  Simultaneously, the pig freed himself from the sack, and started for home, oblivious of the fact that his hind legs were still tied together—a fact which checked its first leap, and sent it rolling, with an ear-splitting yell, against Nick’s legs.  That gentleman awoke with a start, and instinctively put the helm over, just at the wrong moment.  The gust of wind struck them suddenly, and the boat heeled over, too far to right itself.  The sail struck the water, and in an instant Nick, ’Possum and the pig were struggling together in the waves.