The history of the exploration of the world up to the day when Columbus set sail from Palos is just such a history of steps. The Phoenicians coasting from harbour to harbour through the Mediterranean; the Romans marching from camp to camp, from country to country; the Jutes venturing in their frail craft into the stormy northern seas, making voyages a little longer and more daring every time, until they reached England; the captains of Prince Henry of Portugal feeling their way from voyage to voyage down the coast of Africa--there are no bold flights into the incredible here, but patient and business-like progress from one stepping-stone to another. Dangers and hardships there were, and brave followings of the faint will-o’-the-wisp of faith in what lay beyond; but there were no great launchings into space. They but followed a line that was the continuance or projection of the line they had hitherto followed; what they did was brave and glorious, but it was reasonable. What Columbus did, on the contrary, was, as we shall see later, against all reason and knowledge. It was a leap in the dark towards some star invisible to all but him; for he who sets forth across the desert sand or sea must have a brighter sun to guide him than that which sets and rises on the day of the small man. Our familiarity with maps and atlases makes it difficult for us to think of the world in other terms than those of map and diagram; knowledge and science have focussed things for us, and our imagination has in consequence shrunk. It is almost impossible, when thinking of the earth as a whole, to think about it except as a picture drawn, or as a small globe with maps traced upon it. I am sure that our imagination has a far narrower angle--to borrow a term from the science of lenses--than the imagination of men who lived in the fifteenth century. They thought of the world in its actual terms--seas, islands, continents, gulfs, rivers, oceans. Columbus had seen maps and charts--among them the famous ‘portolani’ of Benincasa at Genoa; but I think it unlikely that he was so familiar with them as to have adopted their terms in his thoughts about the earth. He had seen the Mediterranean and sailed upon it before he had seen a chart of it; he knew a good deal of the world itself before he had seen a map of it. He had more knowledge of the actual earth and sea than he had of pictures or drawings of them; and therefore, if we are to keep in sympathetic touch with him, we must not think too closely of maps, but of land and sea themselves.