After the marriage she continued to write under the name of Wiggin. Her literary output included popular books for adults; with her sister, Nora A. Smith, she published scholarly work on the educational principles of Friedrich Fröbel: "Froebel's Gifts" (1895), "Froebel's Occupations" (1896), and "Kindergarten Principles and Practice" (1896); and she wrote the classic children's novel "Rebecca of Sunnybrook Farm" (1903), as well as the 1905 best-seller "Rose o' the River." "Rebecca of Sunnybrook Farm" became an immediate bestseller; both it and "Mother Carey's Chickens" (1911) were adapted to the stage. Houghton Mifflin collected her writings in 10 volumes in 1917.