Title continues: "Contenant la signification, la définition & l'explication de tous les termes de Science & Arts, de Théologie, de Jurisprudence, de Belles-Lettres, d'Histoire, de Géographie, de Chronologie, &c." Berthelin (1720?-80) was a Parisian man of letters. Ordained as a priest, he first became a canon in Toué, then worked as a parliamentary lawyer before finally pursuing a career in education. He taught Latin at the École Militaire for 15 years from 1761 to 1776.