The Abbot: We found the body after a hailstorm, horribly mutilated, dashed against a rock at the foot of the tower, under a window which was, uh, how shall I say this? I trust...
William of Baskerville: Which was found closed.
The Abbot: Somebody told you?
William of Baskerville: Had it been found open, you would not have spoken of spiritual unease - you would have concluded that he'd fallen.
The Abbot: Brother William, the window cannot be opened! Nor was the glass shattered, nor is there any access to the roof above.