In the preface to the first edition I acknowledged the assistance I had derived from the editions of the Fragments of the early writers by Klussman, Vahlen, Ribbeck, and Gerlach; from the Histories of Roman Literature by Bernhardy, Baehr, and Munk, and from the chapters on Roman Literature in Mommsen's Roman History; from a treatise on the origin of Roman Poetry, by Corssen; from Sir G. C. Lewis's work on 'The Credibility of Early Roman History'; from the Articles on the Roman Poets by the late Professor Ramsay, contained in Smith's 'Dictionary of Greek and Roman Biography and Mythology'; and from Articles by Mr. Munro in the 'Journal of Classical and Sacred Philology.' In addition to these I have, in the present edition, to acknowledge my indebtedness to the History of Roman Literature by W. S. Teuffel, to Ribbeck's 'Roemische Tragoedie,' to Ritschl's 'Opuscula,' to the editions of some of the Plays of Plautus by Brix and Lorenz, to that of the Fragments of Lucilius by L. Mueller, to the Thesis of M. G. Boissier, entitled 'Quomodo Graecos Poetas Plautus Transtulerit,' to Articles on Lucilius by Mr. Munro in the 'Journal of Philology,' and to the edition of Lucretius, and the 'Criticisms and Elucidations of Catullus' by the same writer, to Schwabe's 'Quaestiones Catullianae,' to Mr. Ellis's 'Commentary on Catullus,' to R. Westphal's 'Catull's Gedichte,' and to M. A. Couat's 'Etude sur Catulle.' I have more especially to express my sense of obligation to Mr. Munro's writings on Lucretius and Catullus. In so far as the chapters on these poets in this edition may be improved, this will, in a great measure, be due to the new knowledge of the subject I have gained from the study of his works. I have retained, with some corrections, the translations of the longer quotations, contained in the first edition, and have added a literal prose version of some passages quoted from Plautus and Terence. Instead of offering a prose version of the longer passages quoted from Catullus, I have again availed myself of the kind permission formerly given me by Sir Theodore Martin to make use of his translation. EDINBURGH, _Dec. 1880_. PREFATORY NOTE TO THE THIRD EDITION.