Susanna and Sue (1909‪)‬

Popular children's book, first published in 1909. According to Wikipedia: "Kate Douglas Smith Wiggin was born in Philadelphia, and was of Welsh descent… Kate Wiggin devoted her adult life to the welfare of children in an era when children were commonly thought of as cheap labour... devoted to her school, she began to raise money for it through writing, first The Story of Patsy (1883), then The Birds' Christmas Carol (1887). Both privately printed books were issued commercially by Houghton Mifflin in 1889, with enormous success."