The Mystery of the Whispering Mummy

The Mystery of the Whispering Mummy is the third book in The Three Investigators series by Robert Arthur Jr.[1] It was originally published in the United States by Random House in 1965.

The boys receive a letter from Alfred Hitchcock requesting they visit a friend of his, Professor Yarborough, who has a mummy along with other artifacts in his house.

They also receive a letter from a Mrs Banfry in Santa Monica, whose distinctive cat has gone missing.

They meet with the Professor and his butler, Wilkins, who is convinced the whispering is an ancient curse.

The case is taken to a familiar location and Bob and Pete quickly arrive on the scene and the villain is caught.