The discovery of two photographs believed to be of President Abraham Lincoln in profile was presented last month at a very appropriate event, the Lincoln Forum in Gettysburg, Pa., where scholars and students of the 16th president gather each November to discuss new works and discoveries about the man. Although not everyone was convinced, many were willing to say the two successive images most likely included the president as he was arriving at the stage to deliver the Gettysburg Address on Nov. 19, 1863.

The finding is an extraordinary event. There are only about 125 known photographs of Lincoln.

"A new photograph of Lincoln is very precious and very rare," said Harold Holzer, vice chairman of the forum and a leading authority on Lincoln. "In all probability, this is a Lincoln image, but you just want to yell, 'Turn around!' so we could see his full face."

John Richter and Bob Zeller, officers of the nonprofit Center for Civil War Photography, included the discovery in a dramatic presentation of a series of stereographs on Lincoln and the Civil War.

The audience wore 3-D glasses to transform the stereographic paired images into a single three-dimensional image. In the midst of 162 images are two back-to-back images of the crowd at the cemetery dedication, taken by Alexander Gardner.