I'd think a nutcase would've been round-filed instead of kept, but maybe so.
I suspect they have tons of papers of all sorts. They probably kept everything, no matter how ridiculous it seemed.
I wonder how many letters come to the White House, written by wacko nutcases. I'm guessing it's quite a few, and I'm sure they keep them all, even if they make no sense.
There's something about heads of state, etc., that attract wackos to write to them. It would make a great book, IMO. A nice collection of bizarre missives from the bent side of the population.