Will@100 - apologies for not replying sooner but I only just noticed your reply.
You're right that my @97 relied upon the reader either knowing or guessing certain information about me but I have alluded to it in posts on the Guardian Prize blog, often in discussions with Rocky (and much to chagrin of Roof and many others I'm sure) and just hoped that might be enough to elicit a response:-)
I was, of course, being deliberately vague given that the my query involved a part of the theme.
Thankfully, both you and Muraria were able to read between the lines and give me the final nudge I needed to get over the finishing line (saving me from getting in a right 2 'n 8 😉)