Nurse on the Riviera — Marjorie Vernon

Nursing a rich old man suffering from severe arthritis, Jill Arnold accompanies him to the South of France. She meets Ian, an English ex-doctor who is living a hermit-like existence in a tumble down cottage, and they develop a friendship, despite the fact the he obviously has some dark mystery in his life. When Giles Darby, her patient's nephew and only relative, appears on the scene, determined to inherit his uncle's money, he tries to make trouble for Jill.

Although she is upset over this, she is even more worried that Ian refuses to disclose the truth about himself…