This is one of those times when somebody has found an old, forgotten discussion here, probably via google or similar, and has asked a question that is already extensively answered in another thread (begun 11 years ago) that they haven't looked at.

If you check the link to that discussion that I put here six years back, you'll find pretty much everything that's known about it (and a fair bit that is only surmised, not necessarily accurately). If anybody has anything new to say, it would best be said there rather than here.

I'll repeat the link.

Lyrics for Anathea stole a stallion