Don't make the mistake that Llyn Melynllyn (Welsh for Yellow Lake) is a particular variety of hone slate. In early years it may well be that just the honing slates in the immediate vicinity of Llyn Melynllyn were quarried, but 'Yellow Lake' soon acquired brand name status and encompassed a number of slates all from different quarries all sold under the Yellow Lake trademark with no distinction as to origin or performance. That means you cannot even standardise within the confines of a single brand (rather than 'type') of hone. A friend reckons that the stones could have been quarried at four different sites. Early stones seem to have been packed in a box provided by A B Salmen, a london company started in 1850 by Samuel Salmen of Mile End for his son Albert Berl Salmen that provided all sorts of english, welsh and german hones as well as coticules and the like - they were active in the late 1800s at Houndsditch, London, then at Aldgate (executors). A listing of mines from 1908 shows the Llyn Melynllyn owned by the executors of A B Salmen, Mr Salmen having died, evidently. In 1926 we find that the firm has changed name again. It was A B Salmen Ltd, but a resolution was passed in September 1926 to voluntary wind-up the company and appoint Mr E G Bygrave chartered accountant of Wardour Street, London, as the liquidator. The firm was sold to A. Bernstein. A little later the firm emerges in a new guise - The Successors of A B Salmen Ltd - having been bought by Mr R. Waxman and they were active until the late 1980s, running the business from Highgate Hill in London.
The earlier (1890s) advertisements show that A B Salmen's themselves were the successors to S. Samuel. The earlier firm also seems to have been a stone quarrier and importer and furnisher of carpenters bags, etc. On the reverse of an 1890 advert it says "Importer & quarrier. Hones, oilstones, grindstones, scythestones &c, carpenters tool & hand basket importer. Office 1 Castle St. Houndsditch. E.C. Steam works, Salmen St. South Grove, Mile End, London. E. ... [On the reverse] Turkey oilstones, Arkansa ... Water of Ayr stone, Ragstones, Scythe stones, Devon batts, Indian pond stones. Yellow Lake hones, German ... Blue & grey stone slips, Gold testing stones, Clearing stones and curriers' blocks, Turkey, Arkansa & Putty powder, Holy stones, Circular stones, all kinds. Bilston, Blue grit, Newcastle, Yorkshire and other grindstones, also mounted in Iron and Wooden troughs. Importers of tool and painters' baskets".
A B Salmen was well respected among the jewish community of Hackney. Not only was a street named after him, but in 1884 he was elected Warden of Hackney Synagogue and held the post without interruption for 22 years. He died in October 1907, hence the use of 'Exors' (meaning executors) preceeding the company name in 1908. The 1891 Census shows him as being aged 37 and his profession as 'oil stone merchant'.
Albert Berl Salmen's father, Samuel Salomen (changed to Salmen) was born in Prussia in 1818 and the UK 1871 Census shows his occupation as 'stone merchant'.
The boxes underwent a number of changes. Some say that the hones are Genuine Yellow Lake Oilstones, registered & Supplied Direct by the Quarrier. These - the yellow coloured packets anyway - have no mention of A B Salmen on them. However, Salmen's were noted for supplying all sorts of scythe stones, hone stones and masons/carpenters toolbags, and a picture of these things appears on the label just as they do in some of Salmen's other advertising material. Other packets have Salmens name on them, and there are red, yellow and blue varieties and perhaps one other, but I forget....
Most of the hones appear greyish in colour, the actual purple ones being in the minority, and the grit equivalent of these varies between 6k and somewhere below 10k for the most part. However there is one other type that differs in colour and composition - it is almost black (or a very, very dark grey) and instead of being a siliceous slate it is a calcareous siltstone and gives results much like a Silkstone, superior to the rest of the Yellow Lake family of honing slates. The grit equivalent of one of these would be in the region of 11k or so.
The Silkstone is a mystery in itself. It comes in a buff coloured wrapper mostly, although smaller sizes were issued in tins and some were even distributed to the armed forces. The card sleeve has "Silkstone, Razor Hone and Whetting Stone, to be used with oil or water" on it and along another side it has "A Cambrock Product" which implies that 'Cambrock' is a company name, but UK Companies House has no record of it ever having been registered. That makes me think it is a combination of two words - 'cambrian' and 'rock', cambrian directing us back to Wales as a source for the Quarry.
Regards,
Neil