John,
You're driving me crazy by using initials only...at least spell out the titles the FIRST time around during your post; so I can have some sort of hint as to how to decipher them!
I have an easier time deciphering car's vanity license plates!
According to the "Unofficial Danny Kirwan" website, "Purple Dancer" is credited to Kirwan/J McVie/MJK Fleetwood