Input (grade 13): The only known and confirmed photograph of Lincoln at Gettysburg, taken by photographer David Bachrach was identified in the Mathew Brady collection of photographic plates in the National Archives and Records Administration in 1952.
Output (grade 9): The only known and confirmed photograph of Lincoln at Gettysburg was taken by David Bachrach. It was identified in the Mathew Brady collection of photographic plates in 1952.