Another illustrator that was once a significant force in the science fiction books I used to select from the spinning racks of drug stores and the Wee Book Inn has passed away. Locus provided an excellent overview of her career here.
I cannot say that Rowena Morril was one of my favourite illustrators, but at one point, books with her cover illustrations seemed omnipresent. When I decided to pull together a few of my favourites, I was surprised with how few I found. Either I had culled the authors long ago, Piers Anthony or the books are currently misplaced Manly Wade Wellman as the ongoing basement renovations continue. However, I have a few, some of which I love.
How can you not like Clark Ashton Smith?
George R.R. Martin writes the best horror/science fiction short stores in the field. "Sandkings" is probably his greatest short story and quite possibly belongs on any list of the top science fiction stories of all time. This is a nice representation.