This Irish priest in Salamanca has a tendency to seem to be everywhere at once. Sharpe encounters the priest at pivotal moments in the story, such as the pursuit of Leroux outside Salamanca, Helena's party, and the fight with Leroux in the hospital. Curtis is seventy-two years old and a professor of astronomy and natural history at the Irish College in Salamanca. He has a delightful sense of humor, but Sharpe's suspicions about the man prevent him from appreciating the priest's finer qualities. Later in the novel, Curtis visits Sharpe to return Sharpe's rifle. The two men have a conversation, and Curtis reveals some things that are shocking and dramatically affect the plot.