One of my occasional crusades is to try to persuade the mining history world not to use the words "Blackett Beaumont company". This name is an invention of twentieth century mine historians, and was coined to describe the lead mining and smelting business founded by William Blackett and then owned by his family. As the family succession was complicated (they were not very good at producing legitimate male heirs) the name changed from Blackett to Beaumont - but it was never "Blackett Beaumont". The family operated mines in Weardale and the Allendales for well over two hundred years - a great achievement in the ephemeral world of metal mining. Their mining business was not a registered company, and didn't issue shares. I suggest the most appropriate name for the business is "WB Lead" - the name by which it was known in the second half of the 19th century. Ian