Dear SQ

I clipped this from the Internet. Maybe it's a start.

Bacon was known to have invented and used a "bilateral cipher" which
used two different typefaces in each message. Each set of...

Thanks a million. This problem drove me close to the brink of madness.
You saved me, the computer, and the window from destruction.
Now I owe the group one, so I hope somebody somewhare has a...