Nice one Mr Fitzcoraldo.
Found it here:
http://home.freeuk.com/rooted/cupring1.html
Cheers, with much libating to boot, feth, shurrup Hob you're gonna waffle....(?!?)
Hob
OK, this is an "off the wall" suggestion. Could they prehaps have been filled with oil or animal fat to serve as lamps?
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