I worked there many years ago when the site was being converted into its present use (after the closure as a paper mill). Within the grounds, close to one of the large processing sheds, there was a large tree covered grass mound, which I cut a trench through. The mound consisted of millions of buttons, of all kinds. I guess these were removed from clothing ahead of processing for rag paper? After taking the second bucket full home, the wife, who is a good amateur home seamstress, said enough is enough. There was still at least three skips full left!