Prefixed is a letter to Mary, afterwards Queen Mary I, ‘Honoratissimæ illustrissimæque principi D. Mariæ, regiæ majestatis sorori, Joannes Christofersonus perpetuam optat felicitatem’, beginning ‘Non sum nescius, Princeps illustrissima ...’; there follows the Latin version of Plutarch’s entire treatise περί άδολεσχίας (beginning ‘Ardua plane et difficilis’), and then the Greek text, which generally agrees with the Aldine and Basil editions, in those places in which Wyttenbach notices their readings.