His good nurse Maud had left to go to her own home at Skipton, where she married a shepherd belonging to the estate, and after her departure Henry was much more with his mother, who had begun to instruct him in such branches of learning as were considered essential to the education of the young nobility. She taught him to play on the harp and other stringed instruments, to recite verses, sing many of the songs she had herself learned from the minstrels in her father's halls, and, what was of still more importance, she was about to teach him to read, which was not a common accomplishment in those days, for there were no printed books in England till some time afterwards. Printing was then a new invention, and only practised in Germany at one or two of the principal towns, so that the only means of learning to read was from manuscripts written by the monks, generally on parchment or vellum, and beautifully illuminated with a border round every page, in brilliant colours intermixed with gold. In every monastery some of the monks were always employed in making copies of the manuscripts their libraries contained, and others in illuminating them; but these written books were so expensive that none but very rich people could afford to buy them. Lady Clifford, however, possessed a few of these valuable works, and was intending that her son, who was now in his seventh year, should begin to study them, when a heavy blow fell upon the house of De Clifford; and the noble youth, who was born to be a great and wealthy lord, was reduced to the humble condition of a shepherd's boy. Henry was very desirous to know something about the war that kept his father so much from home, and Lady Margaret took great pains to explain to him how it had been occasioned, and why the English people should all be fighting against each other. She told him it was the opinion of many persons that the king, Henry the Sixth, who was then reigning, had no right to the crown, which belonged properly to the Duke of York, who had come over from Ireland and raised an army for the purpose of dethroning the sovereign, and getting himself made king in his stead. She also told him that King Henry, though a very good man, was neither very brave nor very clever, so that he did not take an active part in the war himself, but trusted everything to his queen, Margaret of Anjou, a Frenchwoman, whose bold and daring spirit enabled her to support her husband's cause. "But which do you think is right, mother?" said Henry.