I just found the following image on the Ward Kimball page on Facebook. The person who posted it said:
[Another from the three-eyed women series. A couple have guessed it's for the Haunted Mansion. Not according to Ward. All we know is what he said in an interview once: "These are some portraits I did for Vincent Price. They called up the Studio for someone who'd do a painting of a woman. Nice, old-fashioned, with three eyes. So I sat down and made these sketches. They look like women you see."]
Any idea what this project might have been?