Roughly 20 years ago, Dean [Thomas] was doing research at the Archives and made a photocopy of one of the documents. He then used that information in a book he wrote entitled Round Ball to Rimfire: A History of Civil War Small Arms Ammunition. "I called the Archives [after seeing the document on eBay] to see if they were having a sale," Dean said with a laugh.
Thomas Publications and those eBay documents
Fascinating. Thomas Publications, the Civil War imprint based near Gettysburg, was instrumental in cracking the National Archives/eBay document case: