Stephen Boyd and Pamela Franklin in "The Third Secret" (1964) 

Clip from "The Third Secret", written by R. L. Joseph and directed by Charles Crichton, with music by Richard Arnell. (www.imdb.com/ti...)
Note: The inscriptions on the wall are from "Hamlet". Interesting choice, since in the movie "Catherine" (P. Franklin) tries hard to prove - against all evidence - that her father, Dr. Leo Whitset, who has apparently committed suicide, was in fact murdered.