This image provided by Heritage Auctions on July 2, 2013 shows the original art drawn by writer/artist Frank Miller for the cover to “The Dark Knight Returns” No. 2. The cover has sold for $478,000, according to Heritage Auctions. (AP Photo/Heritage Auctions) PHILADELPHIA (AP) — Heritage Auctions says the original pen and ink cover of “The Dark Knight Returns” No. 2 drawn by artist and writer Frank Miller has sold for $478,000 at auction. A near-mint copy of “Batman” No. 1 has also sold for $567,625 at the auction. The auction house said Friday that the buyers did not want their names disclosed. Miller’s cover was the first to be sold from DC Comics’ 1986 four-issue “Dark Knight” miniseries. The copy of “Batman” No. 1 from 1940 shows Batman and Robin swinging in front of a Gotham City skyline. It was auctioned on behalf of Tadano America Corp. The record price for a comic book remains “Action Comics” No. 1, selling for $2.16 million in 2011. It featured Superman’s first appearance.