Man in the Iron Mask arrested in Calais in 1669 further to the execution of Roux, who would have denounced him when being tortured. Hugh Ross Williamson argues that the man in the iron mask was the natural father of Louis XIV. According to this theory, the "miraculous" birth of Louis XIV in 1638 would have come after Louis XIII had been estranged from his wife Anne of Austria for 14 years. Furthermore, Louis XIII was old, weak, ill, and not expected to live much longer, and thus may have been impotent at the time, implying that he was not the father. The theory then
Man in the Iron Mask suggested that Dauger may have poisoned Fouquet as part of a complex power struggle between Louvois and his rival Colbert. However, evidence has emerged that Dauger de Cavoye actually died in the Prison Saint-Lazare, an asylum run by monks which many families used in order to imprison their "black sheep". Documents have survived indicating that Dauger de Cavoye was held at Saint-Lazare in Paris at about the same time that Dauger, the man in the mask, was taken into custody in Pignerol, hundreds of miles away in the south. These include a letter sent to Dauger de Cavoye's sister, the