Any chance to do similar analysis of UFO albums? Thanks for this - very interesting reading.👍

What is the name/title 'orphan' supposed to be? It's listed after 13. I searched this page for an explanation of what it is but found nothing. It's not a Sabbath release of any kind or bootleg. Also FYI 13 is Black Sabbath's last album. The EP 'The End' was released after 13 though. But it isn't an album. Also, the album 'The Devil You Know' is not Black Sabbath. It's Heaven & Hell's only album. Members: Dio, Iommi, Geezer, and Ward. Forming in 2006, Ward was replaced by Vinny Appice in 2006, and the band existed until Dio succumbed to stomach cancer in 2010.
*Remove whatever "Orphan" is and Heaven & Hell's "The Devil You Know" album.

The orphan section just relates to songs that they recorded, that didn't appear on any of their studio albums. I'm guessing that Heaven & Hells The Devil You Know is included, because it is basically just Black Sabbath going under a different name.

I reckon this will need to be updated when the numbers of the tony martin reissues come out, Anno Domini 1989 – 1995 and the digital streams. the set sold out quickly before release and the label were scrambling to get a 2nd pressing going.