Prospero was a great magician, for he had devoted himself almost entirely to the study of magic during the years in which he allowed his brother to manage the affairs of Milan. By his art he set free the imprisoned spirits, yet kept them obedient to his will, and they were more truly his subjects than his people in Milan had been. For he treated them kindly as long as they did his bidding, and he exercised his power over them wisely and well. One creature alone he found it necessary to treat with harshness: this was Caliban, the son of the wicked old witch, a hideous, deformed monster, horrible to look on, and vicious and brutal in all his habits. When Miranda was grown up into a maiden, sweet and fair to see, it chanced that Antonio and Alonso, with Sebastian, his brother, and Ferdinand, his son, were at sea together with old Gonzalo, and their ship came near Prospero's island. Prospero, knowing they were there, raised by his art a great storm, so that even the sailors on board gave themselves up for lost; and first among them all Prince Ferdinand leaped into the sea, and, as his father thought in his grief, was drowned. But Ariel brought him safe ashore; and all the rest of the crew, although they were washed overboard, were landed unhurt in different parts of the island, and the good ship herself, which they all thought had been wrecked, lay at anchor in the harbor whither Ariel had brought her. Such wonders could Prospero and his spirits perform. While yet the tempest was raging, Prospero showed his daughter the brave ship laboring in the trough of the sea, and told her that it was filled with living human beings like themselves. She, in pity of their lives, prayed him who had raised this storm to quell it. Then her father bade her to have no fear, for he intended to save every one of them. Then, for the first time, he told her the story of his life and hers, and that he had caused this storm to rise in order that his enemies, Antonio and Alonso, who were on board, might be delivered into his hands. When he had made an end of his story he charmed her into sleep, for Ariel was at hand, and he had work for him to do. Ariel, who longed for his complete freedom, grumbled to be kept in drudgery, but on being threateningly reminded of all the sufferings he had undergone when Sycorax ruled in the land, and of the debt of gratitude he owed to the master who had made those sufferings to end, he ceased to complain, and promised faithfully to do whatever Prospero might command. "Do so," said Prospero, "and in two days I will discharge thee." Then he bade Ariel take the form of a water nymph and sent him in search of the young prince. And Ariel, invisible to Ferdinand, hovered near him, singing the while-- "Come unto these yellow sands And then take hands: Court'sied when you have, and kiss'd (The wild waves whist), Foot it featly here and there; And, sweet sprites, the burden bear!"