:Hi . I'm flattered to be asked to take a look, though the article is about something I have absolutely no knowledge! On first reading, it seems a well written article, with appropriate references to support the claims. The only comment I have is about expressing dates in terms of 'BP (Before Present)' rather than in terms of BC or even BCE - I confess I have never seen 'BP' before! As for the possible tautology, I'm not convinced it is - It appears, to me, that it reads well enough as it is. I would certainly encourage you to have a crack. Hope that's of some use! Cheers