The Tryst — Grace Livingston Hill

Patricia Merrill thought she was being adventurous when she ran off to New York, took a new name and a job as companion to an old woman. Her family would never be able to find her now. Then she and her employer took a trip to a charming hotel in the South. To her dismay, Patty discovered that a childhood friend, John Treeves, was staying there too. Perhaps he would tell her family where she was! She knew she must keep her identity concealed--so she pretended not to know him. But it wasn't long before John's sympathetic heart and gentle understanding won her over. And Patty was ready to embark upon the greatest adventure of her life.