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Hi JP
You may well have read something that mentioned a Bacchus sulphide. I have over 50 books about paperweights, and there are some startlingly inaccurate comments in some. But that is to be expected, as authors reflect the thinking of the day, and as time moves on we tend to unearth more evidence that helps bring greater confidence and accuracy in attributions.
If one was collecting in 1950, then attributions such as 'antique Whitefriars dated 1848', 'Bacchus, signed with a 'B' cane', and 'Bristol' would all have been considered reasonable, whereas makers such as Paul Ysart, Pantin, Saint Mandé, Walsh Walsh and Arculus (to name but a few) were unknown to virtually everyone.
Alan