New imaging may reveal Lincoln fingerprints

The Library of Congress' preservation lab recently acquired an array of new, non-invasive, imaging equipment that has uncovered what had previously been invisible on maps, letters and other documents. On the the library's hand written copy of the Gettysburg Address, a thumb print on the front and three fingerprints on the back were illuminated for the first time. They have not yet been confirmed as belonging to Lincoln.

An article by Donna Urschel about this discovery and others appeared in the library's staff newsletter, the Gazette.

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