Margaret Rebecca Piper, Mrs. Chalmers (1879-? ) was the American author of: Sylvia's Experiment: The Story of an Unrelated Family (1914), Sylvia of the Hill Top (1916), Sylvia Arden Decides (1917), The House on the Hill (1917), A Boy's Will (published in Harper's Magazine Feb 1917), Wild Wings: A Romance of Youth (1921), Peter's Best Seller (1923), Babbie: The Story of Babbie Lee, and Some Further Doings of Peter Loomis and Daphne (1925), April and Sally June (1928) and Pollyanna's Protegee (1944).