"
When Western Illinois University's University Television (UTV) Associate Director Roger Kent looked a bit closer at a picture that had been hanging in his office for a few years, he noticed what looked like a signature belonging to the nation's 16th president. Curiosity got the better of him, so he contacted a Lincoln authority: the Abraham Lincoln Presidential Library and Museum in Springfield."
Of course it's real, otherwise I wouldn't be linking to it. Read more at Science Daily. Hidden in plain sight...