Think of the courage that must have been required by a Magellan, a de Quiros, or even a Captain Cook, when they steered into the Unknown from the coast of South America across the broad waters of the Pacific! They had only a limited stock of fresh water: how long would it be before an island or a continent was encountered whereon they could land to replenish their supplies from some spring near the seashore or some stream falling from the hills? They had very little in the way of fresh provisions: when these were exhausted might not their mariners develop that dread disease scurvy,[1] and rot into madness or death? or before arriving at such an extremity mutiny and murder their officers? Food of any kind might become exhausted before fresh supplies could be obtained; and we know from many instances how ready the ship's crew of famished, uneducated sailors was, first to talk of cannibalism, and at last to lay violent hands on an officer or a comrade, kill him, and eat him. Or the undiscovered lands which would be their only resource against a death from starvation, disease, or thirst might be populated by ferocious man-eating savages (as indeed many of them were) and the landing parties of seamen and officers be promptly massacred. Or it might be a desert island, and the pleasing-looking herbs or fruits be deadly poison, or the strange fish, mussels, oysters, clams, whelks, or turtles prove to be so unwholesome that all who ate of this new fare were prostrated with illness. The gallant little sailing ship--little in our eyes whether its capacity were of 30 or even 400 tons--might be charged by a bull cachalot whale as big as an islet, and then and there spring a leak and founder with all on board. There might well be--and there were--treacherous coral reefs just masked by two or three feet of water on which the vessel would be driven at night-time and break her back. The crew would take to their frail boats and then have a thousand or more sea miles to cross, with oar and ineffective sail, before they could find a landing place and sustenance. Perhaps on the way thither (the giant, greedy sharks following in their wake) they died of sunstroke or thirst, or went mad and jumped into the sea and the shark's maw. Or they did reach some South Sea island--not to be discovered again for a century or two--where they were received as demigods by the astonished savages, but where they had to pass the rest of their lives as savages too; consoling themselves as best they could with a Polynesian wife or husband (for there were women sometimes in these ventures, especially on the Spanish vessels) and the growing up of a half-caste family; but never heard of again in their far-away homes, and ever and anon weeping and crying in vain to Heaven to be restored once more to the fair cities and romantic life of Spain or Portugal, or to the comfort and the orderly beauty of a Norman or an English homestead.