I was thinking about how does a family end up owning a company that mines/quarries sharpening stones ? I wonder if they owned the land or leased it ? If there are any records pertaining to that, perhaps through the government, zoning or something like that ? It would be interesting to find out exactly where the quarry was and if it was always in the same geographical area. When it was, where it was, whether the location changed over the years ........ your mission if you choose to accept it ......