The Marriage of Philology and Mercury

Manuscripts give the title De nuptiis Philologiae et Mercurii to the first two books and entitle the remaining seven De arte grammatica, De arte dialectica, De arte rhetorica, De geometrica, De arithmetica, De astrologia, and De harmonia. Mercury gives his bride, who is

…nuptiis Philologiae et Mercurii (The Marriage of Philology and Mercury) contains “On the Art of Dialectic” as book IV.