The Editor's EXPLANATORY NOTE: THE principal object of the present work is to aid the composer of Latin prose in selecting the proper equivalents of about 500 English expressions. This is done by accurately distinguishing the meanings of various Latin "synonyms." and illustrating their uses and constructions by reference to the Latin prose authors of the best period, namely. Cicero. Caesar, Sallust. Nepos, and Livy. In the few cases where other authors are quoted, it is generally with a view to show the difference between their usage and that of the classical authors. The brief method which Dr. Ogilvie adopted in his references requires a word of explanation. The works of Cicero are denoted by their titles without the author's name. Caesar's Gallic War is designated by "Caes.," Nepos by "N.," and Livy by "L. ". Authors, too, are quoted by chapters only, and not by sections. About three-quarters of the present work had been printed some ten years ago on slips, which were pasted into a "scrap-book". The author continued till his decease to jot down fresh references in the margins. These 1 have looked out, copied in full, giving chapter and section, and incorporated where they seemed most in place. The resulting additions constitute about a fourth of the whole work. Two articles have been recast, and a few small notes have been inserted where they seemed likely to be helpful: the latter are enclosed in square brackets. I have also verified all references—more than half the total number — which were left unverified by the author. For the alphabetical arrangement and the index I alone am responsible. It is hoped that the latter will be a useful aid in the study of Latin authors.