Here's a fairly obscure classic for your Halloween week.
Dorothy Burgess plays Juanita Lane, whose parents had been killed in a voodoo ritual. Now married with a young daughter, she returns with her family to the island of her youth to confront her past. greeted as a voodoo priestess, she slowly descends into madness. Fine performances from Burgess, Jack Holt (playing the husband), and Fay Wray (as the family's nanny), a literate script, and evocative cinematography make this one a winner.
A great example of pre-code horror. Directed by Roy William Neill (Frankenstein Meets the Wolfman, Doctor Syn, numerous Basil Rathbone Sherlock Holmes movies) and scripted by Wells Root (I Cover the Waterfront, 1937 and 1952's The Prisoner of Zenda, Texas Across the River) from a story of the same title by Clements Ripley*.
Enjoy this little and effective chiller.
* IMDb noted incorrectly that Ripley's story was taken from Cosmopolitan Magazine; it actually appeared as a serialized novel in Nash's Pall Mall Magazine in 1933.