I picked up a litho at a sci-fi con back in 76 which I got him to sign. Practically begged him to. It is still one of my most prized possessions sitting framed on the living room wall. His art was and is a great inspiration to me. His book covers got me reading all the Edgar Rice Burroughs stuff I could find. Back when a paperback was still 50 or 75 cents. This is sad news indeed. It takes a great artist to produce the kind of work he did even after his stroke a number of years back. R.I.P. Frank. Thank you.