In the newly revealed complete Dictionnaire des termes published in 1701 by Sébastien de Brossard there is a list of more than 60 “Auteurs qui ont écrit en François”, whose works he has personally “seen, read, and examined”. De Saint Lambert is named among them. This definitely proves that one of de Saint Lambert’s works had been published before 1701. This recently unveiled evidence and the diachronic examination of practically all possibly available
historic and contemporary sources, showed that in some points the current view should be changed. In harpsichord teaching and performance, in thorough-bass accompaniment the treatises of de Saint Lambert, F. Couperin and J.-P. Rameau are the basic instruction editions. Only de Saint Lambert and his two treatises bring forth many bio-bibliographic questions, i.e. Les principes du clavecin (the dates of publication have been proved to be 1697 and 1702), Nouveau traité de l’accompagnement is Paris 1707; and the publication of the Traité de l’accompagnement (1680) is under question whether it was a “myth” or it indeed existed according to the historical evidence