The iron gates
by Margaret Millar
From Google Books: "Lucille Morrow was blessed -- a beautiful woman with a devoted husband. One day a mysterious messenger delivered a package, and suddenly Lucille Morrow was gone. Dominated by fear, she committed herself into an asylum. Searching for the cause, Inspector Sands follows a long trail which takes him to an abyss of horror, murder and retribution the likes of which he's never seen."
