No humanist of comparable influence upon Renaissance learning has been so little known and so long ignored as Joannes Susenbrotus. In addition to two fairly popular Latin grammars, Susenbrotus compiled a definitive treatise on the figures of speech, the Epitome Troporum ac Schematum, which during the century following its first appearance in 1541 was the most frequently printed and widely used work of its kind. As T. W. Baldwin has amply established in William Shakspere's Smalle Latine & Lesse Greeke, in the second half of the 16th century this Epitome generally became the standard work from which English schoolboys—including most probably Shakespeare himself—learned their precepts for eloquence. The influence of the Epitome, moreover, extended far beyond the limits of the Latin curriculum and penetrated yet more deeply into the cultural life of England through various English adaptations. On the continent, in German-speaking areas particularly, the influence of Susenbrotus was no less extensive, but even there his fame did not endure. Despite his considerable contribution to sixteenth-century learning and the wide fame of his Epitome, no encyclopedic or biographical work of the present century so much as mentions his name. The most complete account of Susenbrotus' career, in fact, is a five-page study which appeared more than half a century ago in an obscure diocesan publication—a study still of value, though limited in range and inaccurate in some of its conclusions. There is distinct justification, then, for a detailed study of a man whose importance modern scholarship is only just beginning to recognize.