The disease the children have is a real-life, but rare, disease called xeroderma pigmentosa.
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When Ann makes fun of the mute at the dinner table, the mute wears a plum-burgundy dress. Later on when Grace runs down to the gate and hears Ann crying, she's wearing the exact same dress. Seems unlikely the woman of the house would wear the same clothes as the scullery girl. See more...
The disease the children have is a real-life, but rare, disease called xeroderma pigmentosa.
Eric Sykes, who played Mr. Tuttle is almost completely deaf and blind, and was 78 at the time the film was made. Although his part was not very demanding, it was played so well, you would never guess that he could neither see nor hear.
Mr. Tuttle is also the name of the housekeeper from another haunted-house movie, "The Changeling" (1960).
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