Alonso, Sebastian, Antonio, Gonzalo, Adrian, and Francisco escaped to an island, which to them seemed to be a desert. Caliban found them; and a conspiracy was entered into to kill Prospero and secure the person of Miranda. Solemn and strange music was heard, and several strange shapes appeared at a banquet. Thunder rolled, and lightning flashed: Ariel, in the form of a harpy, clapped his wings upon the table, and the banquet vanished. Prospero gave Ferdinand a rich compensation to make amends for past austere punishments; and that compensation was nothing less than the hand of Miranda. He recommended them to be prudent before their nuptials, and told them that if they disregarded his injunctions in this respect, they would have hate and discord between them. Ariel, by an unseen power, induced Caliban and others whom Prospero desired to have in his cell, to repair thither; but before reaching it they were hunted by divers spirits in the shape of hounds, that chased them to the lime groves, where they were secured as prisoners. Prospero, addressing the elves of hills, brooks, standing lakes, and groves, those that on the sands with printless foot chased the ebbing Neptune, the demi-puppets that by moonshine made the sour-green ringlets which ewes would not bite, those whose pastime was to make midnight mushrooms, reminded them that he had, among other mighty deeds, by their aid, rifted. Jove's stout oak, plucked up the pine and cedar, and roused sleepers in the grave. But this rough magic, he informed them, he would abjure, after working his airy charms. This being done, he would break his staff, bury it deep in the earth, and drown his book. Ariel re-entered, and after him Alonso, Gonzalo, Sebastian, Antonio, Adrian, and Francisco, and stood charmed within a circle which Prospero had made.