I cannot agree with Mr. Grote in admitting as genuine all the writings commonly attributed to Plato in antiquity, any more than with Schaarschmidt and some other German critics who reject nearly half of them. The German critics, to whom I refer, proceed chiefly on grounds of internal evidence; they appear to me to lay too much stress on the variety of doctrine and style, which must be equally acknowledged as a fact, even in the Dialogues regarded by Schaarschmidt as genuine, e.g. in the Phaedrus, or Symposium, when compared with the Laws. He who admits works so different in style and matter to have been the composition of the same author, need have no difficulty in admitting the Sophist or the Politicus. (The negative argument adduced by the same school of critics, which is based on the silence of Aristotle, is not worthy of much consideration. For why should Aristotle, because he has quoted several Dialogues of Plato, have quoted them all? Something must be allowed to chance, and to the nature of the subjects treated of in them.) On the other hand, Mr. Grote trusts mainly to the Alexandrian Canon. But I hardly think that we are justified in attributing much weight to the authority of the Alexandrian librarians in an age when there was no regular publication of books, and every temptation to forge them; and in which the writings of a school were naturally attributed to the founder of the school. And even without intentional fraud, there was an inclination to believe rather than to enquire. Would Mr. Grote accept as genuine all the writings which he finds in the lists of learned ancients attributed to Hippocrates, to Xenophon, to Aristotle? The Alexandrian Canon of the Platonic writings is deprived of credit by the admission of the Epistles, which are not only unworthy of Plato, and in several passages plagiarized from him, but flagrantly at variance with historical fact. It will be seen also that I do not agree with Mr. Grote's views about the Sophists; nor with the low estimate which he has formed of Plato's Laws; nor with his opinion respecting Plato's doctrine of the rotation of the earth. But I 'am not going to lay hands on my father Parmenides' (Soph.), who will, I hope, forgive me for differing from him on these points. I cannot close this Preface without expressing my deep respect for his noble and gentle character, and the great services which he has rendered to Greek Literature. Balliol College, January, 1871. PREFACE TO THE SECOND AND THIRD EDITIONS.