The subject of this study was first suggested by Associate Professor Robert J. Bonner, of the University of Chicago, when I was attending his research course in Greek history. At every stage of the investigation, Professor Bonner's suggestion, criticism, and assistance have been generously given and gratefully received, and my indebtedness to his sound scholarship and inspiring teaching cannot be overstated. I wish also to express my gratitude to Professor Paul Shorey, of the University of Chicago, and Dr. Hazel Louise Brown, of Chicago, for their active interest and helpful suggestions; to Professor W. J. Battle, Dr. F. B. Marsh, and Adjunct Professor D. A. Penick, of the University of Texas, for assistance with the proofs, and to Mr. S. G. Sanders, fellow in Greek in the University of Texas, for help in compiling the register of passages and in proof-reading. And lastly, acknowledgment may here be made of the constant encouragement and inspiration which I have received in the course of my work from my parents and from my good friend Dr. J. H. Mills, of Tulane University.