This blog originally had the very narrow purpose of making available recorded and sheet music of the most often played tunes in the music sets. Since its inception, many other dance tunes have been posted, which is awesome, but has had the effect of burying the original tunes, and making them hard to find.
I think the easiest solution is to use the tagging system provided by posterous. I've gone back and tagged my posts with the following tags: "music-set", morris", "performance", "english-country", "sword", and now "info" for this one.
tl;dr: click "music-set" tag (beneath search) for those early posts of the music set tunes.