 Gifted with a precocious intellect and his freshly acquired title of Baccalaureus artium, Agricola early threw himself into the pursuit of the "new learning", with such effect that at the age of 24 he was appointed "Rector extraordinarius" of Ancient Greek at the 1519 established "Zwickau Greek school", which was soon to be united with the Great School of Zwickau (Zwickauer Ratsschule).In 1520 he published his first book, a Latin grammar manual with practical and methodical hints for teachers.In 1522 he ended his appointment to again study at Leipzig for another year, where, as rector, he was supported by his former tutor and professor of classics, Peter Mosellanus, with whom he had always been in correspondence.