Greg said

I see that you don't really go into one very vexatious about the age of a specific song: how you define the song before you try to date it.

Glad you said that Greg, because it brings us onto the next topic area, which I mentioned only briefly above.

The Construction of a Series

Sorry I haven't prepared anything on this yet (I've been on holiday for the past week and I'm only just caching up). I'll tr and post something in the next day or so.

:-)