This chessboard square has been extracted from "Morphy's Games", 1860 <a href="https://en.wikipedia.org/wiki/OCLC" class="extiw" title="w:OCLC">OCLC</a> <a rel="nofollow" class="external text" href="https://www.worldcat.org/oclc/2086470">2086470</a>.
illustrator not known; under the direction of author <a href="https://en.wikipedia.org/wiki/Johann_Jacob_L%C3%B6wenthal" class="extiw" title="w:Johann Jacob Löwenthal">Johann Jacob Löwenthal</a>
Book "Morphy's games", By Paul Charles Morphy, Johann Löwenthal. 1860. <a rel="nofollow" class="external autonumber" href="https://books.google.com/books?id=yCUCAAAAYAAJ">[1]</a>