This volume of the Amsterdam edition of the Latin texts of Erasmus contains several works intended for scholarship in Classics. It includes discourse on the correct pronunciation of Latin and Greek, rhetoric, and Classical Latin, in a compendium of the handbook by Lorenzo Valla, as well as a declamation in praise of medicine.

This additional volume offers a revised edition of Lingua , Erasmus’ work on language, its possibilities and the dangers in its use, ending in a praise of the Word of God. Since it deals with the moral implications of language, Erasmus placed it in Ordo IV that comprises works on moral issues.