No Orchids for a Nurse — Marjorie Harte

Presumed dead after his plane crashed in the jungle, Nursing Sister Sally Bloom had a strong hunch that her husband was alive. Travelling half-way across the world she takes up a post in a primitive river settlement and, despite opposition from her new boss, the dour Dr. Greaves, she goes ahead with her search, only to find a very different husband. Gravely ill, with his memory gone, he poses problems for Sally. And to complicate matters she finds herself drawn to the redoubtable Dr. Greaves.