An interesting theory, but perhaps a little contrived on the face of it and apparently supported by no evidence of any kind (as is also the case, of course, with some of the sillier guesses that people have come out with in this thread). Usually, the obvious answer is the right one; unless, of course, you have any specific suggestions as to where else, if not in documented sources, people might usefully look.

The Bodleian reference provides background information only, as I thought I had made clear.