Throughout his career Arthur Darby Nock (1902-1963) made unique and lasting contributions to classical scholarship and the history of religion, especially to the study of ancient religion, magic, and the relation of paganism to early Christianity and Judaism. Nock's genius showed itself early: endowed with a prodigious memory and an unerring linguistic skill, he combined speed and accuracy in reading and a delight in the discovery, ordering and establishment of facts. At the age of twenty he was made annual reviewer of Latin literature for The Year's Work in Classical Studies; and...