Sowerby (1806) describes "PLUMBUM sulphatum crystallizatum Crystallized Sulphate of Lead" on page 53.

"I believe there is no place in the world, except Anglesea in North Wales, where this substance has been found; and all we have heard or seen of it came from the Parys mine.
We were extremely lucky, after having met with the best collection of crystals in the world, from the present octaedron,
through various modifications, to have found an extraordinary addition in another set that we had received through the favour of our good friend, and friend to Natural History, the Rev. Hugh Davies, F.L.S.
These were so new as to make the former set doubly valuable. The present specimen is not so brilliant as many, but, of the kind, is one of the largest and best crystals yet procured."