Apologies to Bill Troop
Bill, I have done you an injustice and I apologise. The notes that I had were in a clipboard of various notes which I had collected that expand on the contents of "The Film Developing Cookbook" and which I had entitled "Anchell and Troop" and the article was in fact by Steve Anchell. I am really sorry that I was so careless. The web address of that article is:
So again, please accept my apologies, and I take the point made by PE that everyone knows how dangerous mercury is, and would act accordingly.