I totally missed Charles' post, until yesterday for reasons I don't really know I skimmed down to the bottom of the board (which I rarely do) and saw a random poster on a thread about the Londonderry ruby jewels and thought I would click.
I am so glad I did and that you highlighted the thread about the Londonderry emeralds, which I completely missed.
Charles, a new member of the board, has posted some important and fascinating information relating to the Londonderry jewels.
I apologise most sincerely for not having spotted the two entries earlier, Charles.
I am sure everyone will be interested in both of these posts so here are the links.