Tom,
Great to see, atleast Two of us here Think alike on this One! ...
Since, it's Not Going to be a very Hot Topic on SowPubs... Maybe Only on SowPub's ''Senior2Senior' into the Future... Cool play on Seniors & Domaining! ...
So Many Different versions, Answers, comments and Story mix-ups throughout the internet...
But this ones fairly Close...
http://puzzles.nigelcoldwell.co.uk/twentyeight.htm
All the best...
Phil