In a message dated 03/10/2000 5:18:56 AM Eastern Standard Time, 
[log in to unmask] writes:

<< Apart from the allusion to 'victorian reconstruction' you are coy, nay
 silent as to date (I'll agree
 to having heard the name of Maggie Beaufort, but it's not clear whether
 you want to say she was the
 originator of this glassware). I wonder if you can offer us an
 approximate date for any conjectured
 original presentation of this interesting depiction?

Unless there is another famous Margaret Beaufort, I think she means Henry 
VII's mother.  Thus the end of the 15th/ beginning of the 16th cent.


PS The above mentioned Margaret B. did have an aunt by the same name, but we 
are still looking at mid 15th cent.