Found it! The first post by either of us directed at the other.
http://www.freerepublic.com/focus/f-news/1100305/posts?page=18#18
What followed was an exchange of about 7 posts intermixed on that thread followed by a rather strange freepmail from me, followed by about 2 or 3 mail exchanges then pointing out the hobbit hole to me.
That was a little odd back then but it all worked out happily so who's going to laugh at us now?
Oh, great, class time. I hope this goes well.