One of only two films in which Humphrey Bogart sported a mustache. (The other was La caravana de la muerte (1940).)
The instrument upon which the musician is playing the Wedding March in the first scene is a type of Chinese violin called an Erhu.
Based on a novel by W. Somerset Maugham titled "The Narrow Corner," first serialized in Hearst's International Cosmopolitan magazine from October to December 1932.
The story from the Bible that Dr. Hardy tells Eric is from 2 Samuel, chapter 11.
Prologue: "There still remained far from the lanes of traffic, myriads of unmarked islands, the refuge of lost men."