Hi, and thanks for adding the links - seems Challinor Taylor had a shorter life than I'd expected.
Your link showing the 'Ring Handled Slag' design does appear to be a straight lift from Sowerby Pattern No. 1264 from their Pattern Book IX (1882), and was Registered by Sowerby on 29th October 1877 under BoT Rd. 315666 - they had a busy day apparently, and appear to have Registered something like eleven separate shapes/designs.
Assuming your assertion that this particular yellow/amber marbled/mosaic/slag colour correctly belongs to Challinor Taylor, and not Sowerby, it's intriguing to wonder quite why the former should have chosen only those very few Sowerby shapes to copy - perhaps they were the easiest to obtain examples of at the time. We assume they would have purchased some examples of Sowerby glass and then made corresponding moulds.
As mentioned, I've no idea as to the thoughts behind the earlier provenance, on the GMB, that pattern 1225 in amber/yellow marble, was a 'rare colour for Sowerby' - it does seem remarkable that other Sowerby pieces in this particular marbled colour appear not to have surfaced. I've no idea as to who might have added this 'rare colour' of the spill vase to the Board's Sowerby archive - perhaps Fred might have further information - but it would be interesting to know more as to the posting of this amber/yellow item as being from Sowerby.
Without positive provenance/attribution that the spill in amber/yellow on the Board is from Sowerby, then it would seem that your original suggestion of Challinor Taylor is correct, and the Board's example should be treated with caution, and not included as a Sowerby example, without some verifiable provenance.
thanks for bringing this matter to everyone's attention.
