Trivia: Mr. Tuttle is also the name of the housekeeper from another haunted-house movie, "The Changeling" (1960).
Trivia: The disease the children have is a real-life, but rare, disease called xeroderma pigmentosum.
Trivia: 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.
Chosen answer: He is dead, but he has accepted it. He spirit is going to Heaven or Hell and has stopped to say goodbye to his wife and children on the way.
Grumpy Scot