Abstract
Abstract: Alfonso García Matamoros, the author of De ratione dicendi libri duo (Alcalá, 1548), is undoubtedly one of the most important rhetoricians of sixteenth-century Spain. A source study of De ratione, one of three treatises on rhetoric by this author, yields surprising results. García Matamoros borrowed extensively from Erasmus' Ecclesiastes, Melanchthon's Elementorum rhetorices libri duo, and Vives' De consultatione. George of Trebizond's Rhetoricorum libri quinque and Agricola's De inventione dialectica libri tres are also among his sources. Unexpectedly, direct classical influences, although present, are less extensive. An index of sources is provided at the end of the paper.