To unravel the literary history of such a collection is difficult indeed, for it has drawn upon all civilizations and all literatures. But since Hammer-Purgstall and De Sacy began to unwind the skein, many additional turns have been given. The idea of the "frame" in general comes undoubtedly from India; and such stories as 'The Barber's Fifth Brother,' 'The Prince and the Afrit's Mistress,' have been "traced back to the Hitopadesa, Panchatantra, and Katha Sarit Sagara." The 'Story of the King, his Seven Viziers, his Son, and his Favorite,' is but a late version, through the Pahlavi, of the Indian Sindibad Romance of the time of Alexander the Great. A number of fables are easily paralleled by those in the famous collection of Bidpai (see the list in Jacobs's 'The Fables of Bidpai,' London, 1888, lxviii.). This is probably true of the whole little collection of beast fables in the One Hundred and Forty-sixth Night; for such fables are based upon the different reincarnations of the Buddha and the doctrine of metempsychosis. The story of Jali'ad and the Vizier Shammas is distinctly reported to have been translated from the Persian into Arabic. Even Greek sources have not been left untouched, if the picture of the cannibal in the adventures of Sindbad the Sailor be really a reflex of the story of Odysseus and Polyphemus. Arabic historians--such as Tabari, Masudi, Kazwini, al-Jaúzi--and the Kitab al-Aghani, have furnished innumerable anecdotes and tales; while such old Arabic poets as Imr al-Kais, Alkamah, Nabhighah, etc., have contributed occasional verses.