View By Midnight

First published in This Week, April 19, 1964. Reprinted in the anthology Alfred Hitchcock Presents: Stories To Be Read With The Door Locked, Vol II, that anthology reissued as Alfred Hitchcock Presents: I Want My Mummy.
An Italian Prince is using the sale of some of his family's expensive art pieces as a way of smuggling to the Reds working in America messages. Selena Mead is asked to head to Naples to find a way to intercept the instructions.