And then I knew... the castle and its awful history had obsessed her.

8 seconds sound clip from the The Pit and the Pendulum (1961) movie soundboard.

You can hear this line at 00:22:51 in the Blu-ray version of the movie.

Quote context

[...]

- Her appetite began to fade. She began to lose weight and color. I tried to make her eat, but something kept her from it.

- I would come upon her wandering in the corridors at night.

- I tried to find out what was wrong, but she never had an answer except to say that... that something was oppressing her.

- Oh, God, help me for my blindness. I should have known.

- And then, one day, she disappeared. Frantic, I... I searched the castle for her.

- And then I knew... the castle and its awful history had obsessed her.

- These very instruments of torture, which were my birthright and my curse, now tormented her, as well, infecting her with a kind of haunted fascination.

- I watched her drawn to one and then another as if the aura of pain and suffering which surrounded them was luring her to sickness and to death.

- Immediately I made my plans to leave the castle with her.

- We would travel for a while, restore her spirits, and then make our home elsewhere.

[...]