You know, exactly a year ago I went on holiday to Washington. I saw the derringer, and it was dwarf sized. About 7" long.
Hey, I got the replication of what happened in the theater prior to Jay's coin with the hole in the head......Batterups pic matches the bullet path to mine a little better..
Fun Fact: President Lincoln's secretary was named Kennedy, and advised him not to go to Ford's Theater. President Kennedy's secretary was named Lincoln, and advised him not to go to Dallas. Also, Booth originally had a plan to kidnap Lincoln, but that didn't go so well.
The problem with the fun "fact" is that Kennedy didn't have a secretary named Lincoln. Several of the "fun facts" of the Lincoln/Kennedy coincidences are not true or are exactly that, meaningless coincidences But you are right Booth originally planned to kidnap Lincoln, but I believe that was in Baltimore when Lincoln was passing through on his way to Washington for his second inauguration.
Actually, it's the other way around: Kennedy did have a secretary named Lincoln (Evelyn Lincoln), bit Lincoln didn't have a secretary named Kennedy (or at least there isn't any evidence that he did). Here is Kennedy's secretary's obituary from 1995: http://www.nytimes.com/1995/05/13/obituaries/evelyn-lincoln-secretary-to-kennedy-is-dead-at-85.html