Abstract

L. M. de Rijk supposed in 1982 that two anonymous logical tracts in the Viennese Codex 4698, fol. 18r–27v, may be the work of Martinus Anglicus to whom a tract on consequences and one on obligations are ascribed in that codex. The tract on supposition of which the Viennese codex hands down only a fragment of the beginning is contained completely in Hs I 613 of the Stadtbibliothek Mainz, fol. 20vb–21vb. This finding ensures the authorship of Martinus Anglicus and allows to ascribe an Introduction into Logic in some seven parts to him. Martin’s tract on supposition and the more detailed one by Thomas Manlevelt show some resemblances in structure and content, the first being presumably the later one. This paper presents an edition of Martin’s Tractatus de suppositione from the Mainz manuscript and an introduction regarding the author and his work.