"I thought it was interesting. I wonder whether or not those kinds of symmetries of rotationally-equivalent symbols happen a lot by chance."

I don’t see any kind of patterns like this in the 408. I believe that apart from composing the 340 to resemble a cipher he wanted to leave clues that it was not a legit cipher.

Great presentations, thanks for sharing them a while back.

Cheers Richard!

The forum had problems with your tiff files so I converted them:

Thanks Doranchak much appreciated!

The mirror effect reminds me of the Halloween card. Two skeletons, two 14s.