The Matthew Cox Papers contain materials from his work on the book Their Darkest Day: The Tragedy of Pan Am 103 and Its Legacy of Hope, co-authored with Tom Foster. These materials include mostly Research Files pertaining to Subjects and People and accompanied by the author's handwritten notes. Other series include Chapter Notes, Clippings, and Multimedia.

The Tom Foster Papers contain materials from his work on the book Their Darkest Day: The Tragedy of Pan Am 103 and Its Legacy of Hope, co-authored with Matthew Cox. These materials include mostly Research Files pertaining to Subjects and People and accompanied by the author's handwritten notes. Other series include Chapter Notes, Clippings and Newspapers, and Photographs and Negatives