Moonlight at Midday

I've always liked this small gouache painting on bristol board, but it only just dawned on me that it could have been a study for one of Dad's many paperback covers. He labeled the back "Moonlight at Midday," so I searched for a book of that title and easily found Moonlight at Midday by Sally Carrighar, published by Pyramid in 1967. Dad didn't have a copy of the book, nor a proof of the cover in his files, so I'm happy to add something new to his bibliography.