On the 9th of January, 1889, Franz Overbeck was sitting, with his wife, at the window of his quiet house in Basle, when he saw old Burckhardt stop and ring at his door. He was surprised: Burckhardt was not an intimate, and some intuition warned him that Nietzsche, their common friend, was the cause of this visit. For some weeks he had had disquieting notes from Turin. Burckhardt brought him a long letter which all too clearly confirmed his presentiments. Nietzsche was mad. "I am Ferdinand de Lesseps," he wrote, "I am Prado, I am Chambige [the two assassins with whom the Paris newspapers were then occupied]; I have been buried twice this autumn."