Having met him in Washington for the first time we shared a common appreciation of Jane Kostick's wonderful work - she'd told us to look out for one another because she thought it was kind of neat that two of her new fans from another continent would be attending the same puzzle meeting in DC.
It was brilliant to have John join a few of us on a puzzle hunt and see him find a new version of one of his Karakuri puzzles in a Tokyo department store and happily add it to his collection.
...and seeing him in London was truly bitter sweet - we could all see he was struggling, but enjoying being there and getting a huge kick out of taking part in the Exchange - it was exhausting for those of us in good health...
I'd like to think that Big Ben was a way to say Thank You to his puzzling friends - a little something to remember his joy in puzzling.
So long John...
...my thoughts are with all your friends and family everywhere.