According to this document Willis's Current Notes for the Month - November 1853 (no XXXV), it
appears to my reading, that Whitefriars were not making ruby glass.
See page 87 where it
appears to my reading of the reply, that Apsley Pellatt has made a written reply to a question on the origin of ruby glass :
https://books.google.co.uk/books?id=pmk5AQAAMAAJ&pg=RA2-PA87&dq=birmingham+gold+ruby+glass&hl=en&sa=X&ved=0ahUKEwj5-pGxtrzXAhUEJ8AKHaN4BKIQ6AEIJjAA#v=onepage&q=birmingham%20gold%20ruby%20glass&f=falseSee also this article of April 1846 in the Civil Engineer and Architects Journal (Abstract of a paper read by Apsley Pellatt at the Royal Institution) on page 126 left hand column where it
appears to my reading, to say that ruby glass made with gold was something the author seemed to think was unobtainable to 'modern makers', where it says ' ...in fact the modern glassmaker is quite at a loss for this colour'.
This appears to be because of the difficulty of making gold ruby glass when reading the text:
https://books.google.co.uk/books?id=A8NAAAAAcAAJ&pg=PA126&dq=midlands+gold+ruby+glass&hl=en&sa=X&ved=0ahUKEwiW6bexvb7XAhXhL8AKHWX7D_o4ChDoAQg8MAU#v=onepage&q=midlands%20gold%20ruby%20glass&f=falseI would have thought that if Whitefriars were producing gold ruby glass or ruby glass, then Apsley Pellatt might have known about it when that reply was written apparently dated in 1853, if not in 1846.
The texts seems to imply that it wasn't possible to make ruby glass in glasshouses where there were large pots of clear glass being made because of the many difficulties of making ruby glass.
And also seems to say that ruby glass was produced in lumps which could then be used to 'case' other colours.
It doesn't seem entirely clear on where these 'lumps' either were being produced or whether they were gold ruby or ruby glass made with copper.
It reads to me as though there was not the ability to make gold ruby glass at a London glassmaker and possibly not in England at all.
Which I would think leaves the possibilities open that either a) the ruby goblets were made in England using a 'lump' of red glass to case them and with the casing 'lump' possibly being made in England but not of gold ruby glass (?), or b) that the goblet was made elsewhere other than in England. Unless I have 'misread' the narrative in those two document links. Open to correction as always.
I also wonder about the 'lumps' - is it possible that they
cannot have been
gold ruby glass, because the reheating/melting of them to case clear glass might have damaged the gold ruby colour because of the way it was made and reheated to bring out the colour? Would that be true?
On the other hand there were red cased with white glass decanters shown at the Great Exhibition in 1851 under the name of Bacchus iirc ( a Midlands firm). But I do not know if there is written evidence that they were produced at Bacchus (?) or just 'finished' at Bacchus (they are heavily cut if I recall correctly). One would assume though that they must have been blown at Bacchus, if they were exhibited at the Great Exh under English glass? But that is an assumption.
(Kev, sorry about the links - I'll try and work out how to shorten them again).
m