Gothic Mysteries, or: Mystery Gothics

Not really comic book or fantasy art related, but here's a couple pieces of original art I got yesterday:




The Winds of Night, by Anne Maybury. Ace Books, 1963. Unknown artist.




Unknown book, unknown artist, unknown everything. Anyone have any ideas? The image below is on the back of the painting. I've tried searching for Rickover Plot, McHover Plot, lots of combinations. It is 20" x 30," gouache on board.




This Just In (10/24/09): The Nichovev Plot by Nick Carter!