All the lands in the southern seas are supposed to have been populated by castaways, driven by gales out of their reckoning, and landing haphazard at the first land or shore. The first visitor to the unknown and uninhabited land, arriving by accident, would have a struggle for existence, and a hard one too; he would have to improvise his weapons for the chase, and to learn to adapt himself to his new surroundings. His only chance of existence would be to become a nomad, a hunter; and all his spare time would be taken up in finding food and making weapons for the chase; for which Nature provided in a rude way the materials such as flints that break with a cutting or conchoidal edge that would answer very well for carving flesh, fashioning spears, or hollowing vessels for carrying water, though large shells could be used for this; the gum that exudes from many trees would serve to fasten handles to these flint knives. Hard rocks, such as diorite, would be used for axes. These stones require a vast amount of patience in chipping and grinding into shape. To make canoes out of sheets of bark would become a necessity for fishing and visiting the islands, and they would have to be sewn together with twine made from the inner bark of a tree. Wonderfully well made some of those canoes on the coast are; three sheets of thin bark tapered to a point; one sheet for the bottom and one each to form the sides; the fire is laid on some mud on the bottom, with a shell to bail out. Using a single paddle on each side alternately, the natives will make long voyages among the islands on the coast. Primitive Nature would be the castaway's granary or storehouse; the herbs and fruits as they grew naturally, and the wild animals and fish would form the only means of subsistence.