He was influenced by his teacher Roch-Ambroise Auguste Bébian, a hearing man who had learned French Sign Language and published the first systematic study and defense of the language. Berthier was also influenced by two important deaf students of the school who later became teachers: Jean Massieu and Laurent Clerc. By the age of 27, Berthier had become one of the more senior professors at the school.[citation needed]
In late 1837, Berthier petitioned the French government for permission to create the Société Centrale des Sourds-muets, which was officially founded the following year. The organisation aimed to bring together "all the deaf spread across the globe... to put speaking and deaf men of intelligence and heart in rapport with each other, no matter the distance, no matter the difference in language, culture and laws."[citation needed]
Berthier's organisation offered deaf workers a practical avenue to support each other through "mutual aid" and a way to organize and attend adult education classes. Berthier performed a delicate balancing act as a passionate defender of deaf identity and sign language under a repressive social and political climate. He also wrote books about deaf history and deaf culture, noting deaf artists and sign-language poets of his time.[citation needed]
Moody, W (1987). "Berthier, Jean-Ferdinand (1803–1886)". In Van Cleve, J. V. (ed.). Gallaudet Encyclopedia of Deaf People and Deafness. Vol. 1. New York: McGraw-Hill. pp. 141–143. ISBN9780070792296. OCLC13821696.
Quartararo, Anne T. (Winter 2002). "The Life and Times of the French Deaf Leader, Ferdinand Berthier: An Analysis of His Early Career". Sign Language Studies. 2 (2): 182–196. JSTOR26204797.
