Recent studies have proven the specificity and advantages of fingerspelling from a linguistic point of view. However, while the use of fingerspelling is widespread today, it is limited to sign language interactions. The appreciation for both sign language and fingerspelling is recent; in fact, the two systems were often opposed to each other in the late eighteenth and throughout the nineteenth century worldwide. While a number of teachers, doctors, and politicians considered fingerspelling, or dactylology, to be a communication method that could stand on its own, it was the object of a double controversy concerning its use in school and in society and concerning the proper production of signs. This article will focus on the invention of manual alphabets and the debates around them, which divided the deaf-mute community in France in the time between Jacob Péreire's work in 1750 and F. Legrand's in 1902.SLS 19(4) Pgs 491-627.indd 565 7/26/2019 7:36:57 AM have characterized the role of the constant shift between ASL and fingerspelling as a producer of meaning. They have outlined its capacity to qualify specific aspects of the discourse while signifying the integration of scientific, foreign, or other specific terms, thereby qualifying the type of concept involved in the users' discourse. Beyond fingerspelling's use as a cross-modal bridge between ASL and English, Joshua T. Williams and Sharlene D. Newman ( 2016) have delineated many of the ways in which it encourages literary acquisition in children and facilitates the mastery of spelling and reading. The significant proportion of fingerspelling communications within ASL, 1 and the increasing number of linguistic studies gauging its contribution in the last decade, might make us think that it has always accompanied sign language as a necessary complement and that the history of the support or rejection of fingerspelling closely mirrors that of sign language itself (see, for example, Brentari 2011; Johnson and Liddell 2011;Padden 2006;Padden and Ramsey 2000). Yet that is far from being the case. From the late eighteenth century on, its role has been the object of much discussion among French deaf and hearing teachers and doctors. 2 While many of its defendants have seen in fingerspelling a pedagogical, intellectual, and social tool, offered new versions of it, and strove for its improvement, its detractors have looked upon it with distrust. From these detractors' perspective, finger spelling stands for letters, which express sounds and not meanings. As evidenced by Padden and Gunsauls, who study its contemporary use, "The controversy centers around whether it is a friendly partner of sign language or is antagonistic to it. Ironically, the structural properties of the manual alphabet lend themselves to either purpose: Like sign languages, the manual alphabet represents visible language, yet like speech it consists of a finite set of arbitrary symbols used in sequences to build words and sentences" (Padden and Gunsauls 2003, 13), From the late eighteenth century on, d...