The story of Houdini's wife making contact after his death with a secret code being revealed by a "psychic" did take place, but later revealed to have been faked.
Twice during the movie, footage of a steam locomotive is used to depict the travel of Nandor and Anne. However, the locomotive footage used is from an American railroad, while the movie is set in the British Isles.
British steam locomotives did not feature a large headlamp or bell, as a rule. And the inclusion of the steam whistle sound is correct for a British locomotive, but wrong for the American locomotive depicted in the film.
British steam locomotives did not feature a large headlamp or bell, as a rule. And the inclusion of the steam whistle sound is correct for a British locomotive, but wrong for the American locomotive depicted in the film.