About halfway through a PBS program on the Library of Congress, Dr. Daniel Boorstin, the Librarian of Congress, brought out a little blue box from a small closet that once held the library's rarities. The label on the box read: "Contents of the president's pockets on the night of April 14, 1865. Since that was the fateful night Abraham Lincoln was assassinated, every viewer's attention was seized. Boorstin then proceeded to remove the items in the small container and display them on camera. There were five things in the box:…