The Diving Girl
With her uncle she visits the seashore and goes bathing with a party of her brother's friends. Uncle also takes a dip and is annoyed at the perilous performance of the girl. He orders her from the water and locks her in her room, but brother releases her. He finally concludes that home is the best place for her, for there she will run no chance of drowning.
Directors: Mack Sennett
IMDB: tt0001584