A handwriting analysis has been done by John Lupton, who's involved in a project to preserve Lincoln's paper at the Lincoln library in Springfield, Ill. Lupton says he's "pretty sure" the signature is genuine, because it has Lincoln's distinct characteristics.
A Lincoln memorabilia dealer says it could be worth up to $25,000. Steiner says he paid about $20 for the papers.
Steiner doesn't plan to sell.
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