A major recent edition, which reverts to the Syrian recension, is a critical edition based on the fourteenth- or fifteenth-century Syrian manuscript in the Bibliothèque Nationale originally used by Galland. This edition, known as the Leiden text, was compiled in Arabic by Muhsin Mahdi (1984–1994). Mahdi argued that this version is the earliest extant one (a view that is largely accepted today) and that it reflects most closely a "definitive" coherent text ancestral to all others that he believed to have existed during the Mamluk period (a view that remains contentious). Still, even scholars who deny this version the exclusive status of "the only "real" Arabian Nights" recognize it as being the best source on the original "style" and linguistic form of the mediaeval work.