Then follows an extraordinary string of anatomical, medical, scientific, and Talmudic questions about the optic nerves; the teeth; why a man lowers his head when thinking over things he has never known, but raises his head when thinking over what he once knew but has forgotten; the physiology of the digestive organs, the physiology of laughter; why a boy eats more than a man; why it is harder to ascend a hill than to go down; why snow is white; why babies have no teeth; why children's first set of teeth fall out; why saddest tears are saltest; why sea water is heavier than fresh; why hail descends in summer; why the sages said that bastards are mostly clever. To these questions, which Enan pours out in a stream, Joseph readily gives answers. But now Enan is hoist with his own petard. "I looked at him," continues the poet, "and sleep entrapped his eyes, and his eyelids kissed the irides. Ah! I laughed in my heart. Now I will talk to him, and puzzle him as he has been puzzling me. He shall not sleep, as he would not let me sleep. 'My lord,' said I, 'let me now question thee.' 'I am sleepy,' said he, 'but ask on.' 'What subject shall I choose?' I said. 'Any subject,' he replied; 'of all knowledge I know the half.'" Joseph asks him astronomical, musical, logical, arithmetical questions; to all of which Enan replies, "I do not know." "But," protests Joseph, "how couldst thou assert that thou knewest half of every subject, when it is clear thou knowest nothing?" "Exactly," says Enan, "for Aristotle says, 'He who says, I do not know, has already attained the half of knowledge.'" But he says he knows medicine; so Joseph proceeds to question him. Soon he discovers that Enan is again deceiving him; and he abuses Enan roundly for his duplicity. Enan at length is moved to retort. "I wonder at thy learning," says Enan, "but more at thy appetite." Then the lamp goes out, the servant falls asleep, and they are left in darkness till the morning. Then Joseph demands his breakfast, and goes out to see his ass. The ass attempts to bite Joseph, who strikes it, and the ass speaks. "I am one of the family of Balaam's ass," says the animal. "But I am not Balaam," says Joseph, "to divine that thou hast eaten nothing all night." The servant asserts that he fed the ass, but the animal had gobbled up everything, his appetite being equal to his owner's. But Joseph will not believe this, and Enan is deeply hurt. "Peace!" he shouts, and his eyes shoot flames, and his nostrils distil smoke. "Peace, cease thy folly, or, as I live, and my ancestor Asmodeus, I will seize thee with my little finger, and will show thee the city of David." In timid tones Joseph asks him, "Who is this Asmodeus, thy kinsman?" ENAN REVEALS HIMSELF