The Bachelor Daddy (1922)

After his mining partner Joe Pelton's (MacDonald) death, wealthy bachelor Richard Chester (Thomas Meighan) adopts Joe's five young children and takes them East by train. The children upset the calmness of the passengers of the Pullman car en route to New York City, and when they arrive at Richard's home they drive the servants almost crazy. Richard enrolls them all in school except for the youngest. His fiancee Ethel McVae (Maude Wayne), a frosty society woman, refuses to have anything to do with the children and breaks their engagement when she sees how Richard reacts when his stenographer Sally Lockwood (Leatrice Joy) helps him nurse the youngest child through a night's illness. The secretary wins Richard's love through the baby.