This paper aims to uncover new clues about a disputed chapter in our historiographical tradition: was there an edition of the academic grammar published in 1788? Although no one has found hard copies of this book, some authors speak of it; others, however, directly deny its existence and doubt its publication citing a lack of evidence. Our work intends to serve as a link between these distincs points of view, attempting to prove the existence of the GRAE-1788 through a typographical study of different copies of the previous edition, published in 1781, that we have in our libraries.