To write a story about an orphan who has only known the Sisters-- without creating a sentimental, sniveling tale would require restraint- a word unfamiliar to this author. Poor Mary Kate never receives any letters, never has any visitors, until Robbie comes to the orphanage. She devotes herself to the small child, teaching him to talk and walk. When Robbie's father comes to see him on Sundays, he becomes Mary Kate's visitor too, and she experiences a new happiness. Mary Kate and Robbie become members of the same family when Robbie's father and his new wife legally adopt Mary Kate. Young readers will doubtless be provoked to tears,--tears which should be saved for a more satisfying, less obviously emotional book.