The Shuttered Room

The Shuttered Room is a 1967 British horror film directed by David Greene and starring Gig Young and Carol Lynley as a couple who move into a house with dark secrets. It is based on a short story of the same name by August Derleth and H. P. Lovecraft. The film has also been rereleased under the title Blood Island. Although set in the US, the film was shot in Kent and Norfolk, England. The film features a large, halfbrick, halftimber watermill, which is destroyed by fire in the closing scenes. The building used was Hardingham Mill on the River Yare in Norfolk.

The script was originally written by Alex Jacobs and Nathaniel Tanchuck. Filming began in April 1966.

Source: Wikipedia