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