As is now commonly believed, the text of the Testament does not belong to the pen of Nicolas Flamel; it was written much later, presumably in the second half of the 18th century. And yet, it cannot be called falsification in the full sense of the word, since it is undoubtedly written by an adept who followed the path of Flamel, and hid his name behind the signature of the old Master, which fully corresponds to Tradition. According to legend, the original text was written by Flamel in the margins of a pocket psalter in the form of a cipher, the key to which he gave his nephew.