Uncle Fritz said yes to all her questions, but he said that they did not cover the whole matter. The difference between a magician and a man of science involves these habits: the magician keeps secret what he knows, while the man of science discloses all he learns. Then the magician affected to have spiritual power at command, while the man of science only affects to use what he calls physical powers. Till either of them tell us how to distinguish spiritual forces from physical forces, the second distinction is of the less importance. But the other has made all the difference in the world between the poor magic-men and the science-men. For, as they had seen with Friar Bacon, the magic-men have had their stories told by most ignorant people, seeing they did not generally leave any records behind them; but the men of modern science, having chosen to tell their own stories, have had them told, on the whole, reasonably well, though generally stupidly. "What a pity we have not Solomon's books of science!" said John Tolman. "It is one of the greatest of pities that such books as those were not kept. It seems as if people would have built on such foundations, and that Science would have marched from step to step, instead of beginning over and over again. But we do have Pliny's Natural History, as he chose to call it. Far from building on that as a foundation, the Dark Ages simply accepted it. And there are blunders or sheer lies in that book, and in Aristotle's books, and Theophrastus's, and other such, which have survived even to our day." The children were peeping into the collection from which the Friar Bacon stories had been read, and they lighted on these scraps about the supposed life of Virgil. To the people of the Dark Ages Virgil was much more a man of magic than a poet. HOW VIRGILIUS WAS SET TO SCHOOL.