Jane Webster is the author of Daddy Long-Legs and she also wrote The Four Pools Mystery:
Could a tyrannical plantation owner be responsible for his own murder? An unusual and stirring story of mystery and tragedy, in which the portrayal of life on a Southern plantation and the horror and fear roused in the negroes by what they believed manifestations of the ancestral "ha'nt" is clearly and vividly done. It is a book to keep its readers up nights.
"Jean Webster (pseudonym for Alice Jane Chandler Webster, July 24, 1876 – June 11, 1916) was an American writer and author of many books including Daddy-Long-Legs and Dear Enemy. Her best-known books feature lively and likeable young female protagonists who come of age intellectually, morally, and socially, but with enough humor, snappy dialogue, and gently biting social commentary to make her books palatable and enjoyable to contemporary readers." Wiki