A new episode of Research Rabbit Hole, our Facebook Live show, premiered Monday evening, March 9, at 9 p.m. ET.

Season 1, Episode 5, examines a persistent story about Civil War photographers who, long after the end of hostilities, sold glass plate negatives of battlefields, famous generals and Abraham Lincoln as scrap glass later used in greenhouses. They gradually faded away—ironically destroyed by the very sunlight responsible for image creation. The story has been told by many, including Ken Burns. Did photographer’s really sell their negatives?

The full season is available on YouTube.

New episodes of Research Rabbit Hole will be released every two weeks on our Facebook page. The host, Ronald S. Coddington, is Editor and Publisher of Military Images.