Thanks for the attribution, that was quick!
I have just spent an informative half an hour reading through the past threads - how fascinating! Did the discussed proposed research and definitive article on peacock eye glass ever happen?
This is the second piece of peacock eye glass to pass through my hands, and I have to admit it is a favourite pattern of mine.
I really need to improve my collection of glass books, but I would so much rather spend any spare money on glass than on a book, so my library is slow taking shape.