Aunt Janes Nieces on the Ranch

In this “Aunt Jane’s Nieces” book It has been 14 months since the last book, and Louise has a five-month old baby and is now living with Arthur in a newly-bought ranch in California. Uncle John yearns to see the baby, who is named Jane, and decides to head out to California once again with Louise, Beth, and the Major. Baby Jane had recently been ill but was cured by her Mexican nurse Inez. Uncle John decides to hire his own trained nurse named Mildred Travers to assist in caring for Baby Jane. Clashes between both nurses ensue. One day, Louise, Arthur, Uncle John, the Major, Beth, and Patsy leave Jane in the care of the two nurses to meet some neighbors. But when they come back home, baby and nurses are gone! None of the other servants saw them leave, but they are not there. What has happened to them?