Originally published in 1950, this book was based upon the Kaye Prize Essay for the year 1947. The text deals with a special problem offered by the Philonic evidence, and also forms part of a comprehensive inquiry into the nature and history of the text of the Septuagint. Detailed analysis is given on the distinct set of quotations from the Old Testament which in some parts of Philo's work differ to a greater or lesser extent from the wording of the Septuagint. This book will be of value to anyone with an interest in Philo, philosophy and theology.