The Dreyfus Affair and Its Cause The two men brought forth grave accusation, Henry said: an impeachable gentleman of war, warned me there was a traitor on staff and pointed to Alfred Dreyfus while shouting "he's right over there."(3) When asked to reveal his source by Dreyfus's lawyer, the court came to Henry's defense stating they understood why military men have to kept in secret. Then General Mercier introduced a man of strange background, his name was Mercier de Paty de Clam. Clam drew a fake file on Dreyfus to show him that he was indeed guilty of treason. The evidence now, tru