Arthur Adams Original Art. Preliminary Cover Sketches for. Avengers Classics 12 & Unpublished Herc issue. I just bought this page recently but unfortunately need to part with it. Check out my other auctions for more great stuff!!!!! Please feel free to ask me any questions. Dont ask for an alternate method. The item “Art Adams Original Art Preliminary Cover Sketches Avengers Classic 12 & Herc” is in sale since Monday, March 9, 2020. This item is in the category “Collectibles\Comics\Original Comic Art\Drawings, Sketches”. The seller is “hokietect” and is located in Mount Laurel, New Jersey. This item can be shipped to United States, Canada, United Kingdom, France, Germany.