(Roger Bacon, the learned monk of the thirteenth century seems to have suspected their existence, but he wisely kept his discovery to himself) they often drank unclean water and sometimes the whole crew died of typhoid fever. Indeed the mortality on board the ships of the earliest navigators was terrible. Of the two hundred sailors who in the year 1519 left Seville to accompany Magellan on his famous voyage around the world, only eighteen returned. As late as the seventeenth century when there was a brisk trade between western Europe and the Indies, a mortality of 40 percent was nothing unusual for a trip from Amsterdam to Batavia and back. The greater part of these victims died of scurvy, a disease which is caused by lack of fresh vegetables and which affects the gums and poisons the blood until the patient dies of sheer exhaustion.
Under those circumstances you will understand that the sea did not attract the best elements of the population. Famous discoverers like Magellan and Columbus and Vasco da Gama travelled at the head of crews that were almost entirely composed of ex-jailbirds, future murderers and pickpockets out of a job.
These navigators certainly deserve our admiration for the courage and the pluck with which they accomplished their hopeless tasks in the face of difficulties of which the people of our own comfortable world can have no conception. Their ships were leaky. The rigging was clumsy. Since the middle of the thirteenth century they had possessed some sort of a compass (which had come to Europe from China by way of Arabia and the Crusades) but they had very bad and incorrect maps. They set their course by God and by guess. If luck was with them they returned after one or two or three years. In the other case, their bleeched bones remained behind on some lonely beach. But they were true pioneers. They gambled with luck. Life to them was a glorious adventure. And all the suffering, the thirst and the hunger and the pain were forgotten when their eyes beheld the dim outlines of a new coast or the placid waters of an ocean that had lain forgotten since the beginning of time.
