The first film in which Margaret Lockwood highlighted a mole high on her left cheekbone. Although noticeable in some earlier publicity shots, she henceforward marked it in black, and it became a trademark of sorts.
Both James Mason and Barbara Mullen were in their early 30s playing a couple in at least late middle-age. Mason in particular wanted to show his range, playing against type as an avuncular, older Yorkshireman (he was from Huddersfield). In his autobiography he admitted that his performance was a failed experiment, and indeed his accent slips sometimes and his make-up and hair-lace are very obvious in close-ups. He realized that in as far as his Gainsborough Pictures roles were concerned, "the fan population wanted me to appear only some heroic young lady-killer; or better still, lady-basher."
Bellingham House in Newborough is purchased by the Smedhursts on [Thursday] April 12th 1900. Their garden party (accurately) occurs on Friday 10th August of that year; whilst the body of Elizabeth Harkness was discovered at the house on [Saturday] 11th August 1860.
Elderly Dr. Marsham's lines are all clearly dubbed.