La véritable manière d’instruire les sourds et muets.

The Abbé de L’Épée met two deaf girls, decided to educate them, and soon had a class of 60 devoted pupils, whom he supported and amongst whom he lived. He based his methods on those of Bonet and Amman, and was the first to attach great importance to signs. This is l’Épée’s most definitive work. It contains a reprint of No. 3358.