Richard Smythe’s sister, who lives with him. Miss Smythe and Richard invite people to their apartment to discuss atheism, and it is Miss Smythe’s job to help make those who come to visit feel comfortable. Having learned that Sarah spends a lot of time at the Smythes’ apartment, Bendrix takes Lance there one day in an effort to learn more about the nature of Sarah’s comings and goings. Bendrix pretends that Lance is sick, hoping that Miss Smythe will invite them inside to see Richard. Because Sarah had gone to the apartment so much to listen to Richard talk, Miss Smythe was familiar with Sarah. As Bendrix and Lance prepare to leave, Bendrix tells Richard that he should meet “a friend of [his], Mrs. Miles.” Miss Smythe immediately exclaims, “Oh, my dear,” implying that she knows Richard had proposed to Sarah and the pain that hearing the name “Mrs. Miles” would cause him.