I have to thank Mr P. Giles, Fellow of Emmanuel College, Cambridge, for reading almost all my notes in proof and giving me many valuable suggestions. Also Mr W. Chawner, Master of Emmanuel, for doing me the same service in regard to some of the notes. Mr W. W. Wroth of the British Museum for aiding me to select some coins. Also Mr J. G. Frazer, Fellow of Trinity College, Cambridge, and Mr P. E. Matheson, Fellow of New College, Oxford, for kind aid when appealed to for it. Lastly I owe more than I can say to the care and kindness of the officials of the Press.
