Originally published in 1937, this book began as a doctoral dissertation by Reginald Witt on the subject of the Didaskalikos and its often overlooked author Albinus (also called Alkinoos). Witt looks at the philosophical text with an eye to its setting within the various strains of Platonism and other relevant schools of ancient philosophy. This text will be of value to anyone with an interest in Middle- and Neoplatonism and in the writings of Albinus.