Mona Lewis's physician, who gives her the fatal diagnosis of cancer, Barton apologizes for his lack of tact, after mentioning that she will not live to Christmas. Barton deals mostly with immigrants. He enjoys Mona's matter-of-factness. He goes along with her plan to be diagnosed away from her own neighborhood. He is uncomfortable letting her pay in cash rather than through insurance, especially for a hopeless diagnosis. He is sad, realizing that this is her last visit, as any follow-up will be done by her normal doctor in Hampstead. He snaps at the next patient.