It's a neat story, but I am suspicious too. The photo in the Springfield Gazette is a mirror image of this one: http://en.wikipedia.org/wiki/File:Abelincoln1846.jpeg . Wikipedia claims this photo is from 1846, but the newspaper is from 1845. Also, I would be surprised if a photo could be printed with that level of detail in 1845.
I wonder if this more of a tribute to P.T. Barnum (the first subject mentioned in the article) than Abraham Lincoln.