Does anyone have any colour pictures of this glass in their libraries?
Yes, Colour Plate III from "Decorative Arts 1850 -1950, A Catalogue of the British Museum Collection" by Judy Rudoe, British Museum Press 1991 (revised 1994).
There is also a complete set of B/W photos of the D'Humy collection in addition to text discussing them.
I remember visiting the BM with the Glass Association many years ago, when, for me, the high-light was seeing these pieces in the reserve collection. The B/W pictures in particular do not do justice to them.
Whilst there is reference to him being a copiest, I would suggest that these pieces exhibit a fresh approach to the use of gold and/or silver foil to the past - just as with other later uses mentioned in this thread. In other words there is a progression in design, whether or not influenced by the predecessor(s).
By-the-by, don't forget the use of gold, and silver, foil as well as mica in early Harry Powell designed vessels.
Kind regards, Nigel