Nachbiblischen Judenthum, 1861), his contributions to the sources of the Arabian Nights ( Zur rabbinischen Sprach-und Sagenkunde, 1873), and his notes on rabbinic antiquities ( Beitrage zur rabbinischen Sprachund Altertumskunde, 1893). Perles' essays are rich in suggestiveness, and have been the starting-point of much fruitful research. He also wrote an essay on Nachmanides, and a biography and critical appreciation of Rashba (1863). (I. A.)