Welsh Slate Company
The Welsh Slate Company changed a lot over the past 180 years, from its ownership, its full and proper title, through to the land it actually operated on.
Although the company name is still in use, there is no real connection to the company referred to in this wiki. Their web site is here
Another site, having historical links is the Greaves Welsh Slate Company, and their site can be found here
This is a stub reference point