Believe it or not, this is Abraham Lincoln...probably. He's in his early thirties here.

Numerous accounts have revealed that Lincoln underwent a noticeable change in his physical appearance beginning in January 1841 as a result of a grave emotional crisis. This coincides with his reported failure to go through with his scheduled marriage to Mary Todd, leaving her literally waiting for him at the altar. (They were married the following year.) This emotional crisis, just one of a series of such episodes to plague him throughout his life, was the cause of Lincoln losing a considerable amount of weight.

Young Lincoln was known to be muscular and extremely powerful. The older Lincoln was much thinner, and also prematurely aged by personal problems and the responsibility and anguish of the office he held during perhaps the greatest crisis the United States has ever undergone.

(via kottke)