Marjorie in Charge by Carolyn Wells is number four in the Marjorie Series. When Mr. and Mrs. Maynard go on a trip, Marjorie and her siblings are left to the care of Miss Larkin, a middle-aged spinster who is not used to children. The children don't know what to make of Miss Larkin and she isn't sure what to do about their frolicking and teasing.