Mary Mulholland did not nurse professionally after the death of Mrs. White, probably because she was in her sixties by that time. Miss Rivero recalled that Miss Mulholland would go "quietly among the poor and used her knowledge and skill to help them; she never refused a call from them." After the outbreak of World War I, Miss Mulholland became active in the Putnam Country Red Cross Chapter, serving as Vice Chairman in 1917 when the chapter was first organized. She allowed the Red Cross to use the east wing of her home as a work room, and she herself made service calls to the homes of soldiers.