If you're still scratching your head, don't worry. You'll figure it out.
It may help if you have read the mystery novels about The Three Investigators, featuring junior detectives Jupiter Jones, Pete Crenshaw, Bob Andrews, and, of course, the great Alfred Hitchcock. The characters were created by Robert Arthur and their adventures continued by William Arden (real name Dennis Lynds), Nick West, M.V. Carey and others.