Newspaper article recounting an event at the Fifth American Chess Congress in 1880 involving collusion between two players.
The Philadelphia Inquirer
The Philadelphia Inquirer of 08 Mar 1880, page 4 via <a rel="nofollow" class="external free" href="https://www.newspapers.com/clip/117781788/chess-fraud-in-the-noble-game/">https://www.newspapers.com/clip/117781788/chess-fraud-in-the-noble-game/</a>