I belong to a puzzle site called The Stone and one of the puzzles I had to solve was created in an alternate language called ROT13.

Explanation: A simple Caesar-cypher encryption that replaces each English letter with the one 13 places forward or back along the alphabet, so that "The butler did it!" becomes "Gur ohgyre qvq vg!"

I thought I would share it here (although it did not produce anything on Page 63 with the extra letters!) because of the number "13" being somewhat significant to us.