Maurice Bloomfield was an American philologist and Sanskrit scholar. Cerberus, The Dog of Hades discusses Cerberus in Greek and Roman literature, Cerberus in classical art, Veda, the two dogs of Yama, the two dogs of heaven, Cerberi in Norse and Persian myths, and other topics. In Greek and Roman mythology Cerberus is a multi-headed hound (usually three-headed, who guards the gates of Hades to prevent those who have crossed the river Styx from ever escaping.