Steven, in his comment on my "Extended bits & pieces ..." post just a couple of days ago, advised me of a 'cool story from waaaaaaay back when'.
Well, I finally found it, and it is a neat story! It was published in the Washington Post just two days ago. (I don't know how Steven gets all of this stuff on such a timely basis, but I'm sure glad he does!)
The headline reads "Hidden Message Found in Lincoln Pocket Watch". You can read all about it here. Fascinating!