I while ago I was lent a copy of one of those "local history" books about our area and it mentioned an old mill, closed and ruined since the 1930s. I always wondered what it did and the book said it was a file reconditioning factory. Brock bottoms Mill was miles out in the country, it's reason for being there was a river, it was water powered ,which proved it's undooing as the dam bust and they couldn't afford to rebuild it. Seems there must not have been much money in reconditioning files.