Voltaire added a few further details which had been given him by M. de Bernaville, the successor of M. de Saint-Mars, and by an old physician of the Bastille who had attended the prisoner whenever his health required a doctor, but who had never seen his face, although he had "often seen his tongue and his body." He also asserted that M. de Chamillart was the last minister who was in the secret, and that when his son-in-law, Marshal de la Feuillade, besought him on his knees, de Chamillart being on his deathbed, to tell him the name of the Man in the Iron Mask, the minister replied that he was under a solemn oath never to reveal the secret, it being an affair of state. To all these details, which the marshal acknowledges to be correct, Voltaire adds a remarkable note: "What increases our wonder is, that when the unknown captive was sent to the Iles Sainte-Marguerite no personage of note disappeared from the European stage."