Spliced into a World War I reel and discovered here, footage of the deadly SS Eastland disaster surprised a graduate student recently, and no one is quite sure how it got here.

This video originally appeared on Slate Video. Watch More: slate.com/video

Jim Festante is an actor/writer in Los Angeles and regular video contributor to Slate. He's the author of the Image Comics miniseries The End Times of Bram and Ben.