 Decker's article is the only source for this story or even for the existence of Valfierno and Chaudron.He was famous for taking liberties with his articles, and many of the facts and details he provides in the article are incorrect, including the size and weight of the "Mona Lisa" and the type of wood it was painted on.That and the fact that a century later none of the alleged copies have been found casts serious doubts on the accuracy of the story and the existence of Eduardo de Valfierno.