This rare French work by an anonymous knight contains an explanation of the Wet Path to the Stone and a clear and explicate distinction between the medicinal and transmutational Stone. At its time of appearance in 1669, this book was immediately recognised for its value. Minister Paulmy d’Argenson was assigned to uncover the true name of this unknown knight. Yet however wide and far reaching the minister’s intelligence organisation was, the nameless master remained invisible. We present here the earliest edition of this fascinating mss – the one also found in Fulcanelli’s library.