A student at Miami University has discovered what experts say is a fingerprint belonging to Abraham Lincoln from nearly 150 years ago.

Lydia Smith, a first-year psychology major from Granville, Ohio, was transcribing a letter written by Lincoln on Oct. 5, 1863, for a class project when she noticed a smudge that she suspected could be the 16th president’s thumbprint. Lincoln historians have confirmed the print.

The Papers of Abraham Lincoln, a project of the Illinois Historic Preservation Agency and Abraham Lincoln Presidential Library and Museum, reviewed and confirmed the print, making it the second rare fingerprint of the 16th president housed at Miami’s libraries.

Source