Pepe: I received your message but the Genii message function does not seem to allow for replies. Send me a note to firstname.lastname@example.org
and I'll provide you with whatever you need. Your question about Martin Nash probably relates to his work with the Royal Canadian Mounted Police in British Columbia when they were tracking some card cheats. He tipped them to the juice deck. I talked to the Mountie involved and I have a copy of the newspaper article somewhere. According to the article, they were using Lady Clairol for the "juice."
There are several very good Canadian card magicians but you may never have heard of them. I'm thinking of Roy Cottee, Charlie Roe (deceased), Ron Scharf (deceased) and some others. And don't forget Joe Stuthard and Cliff Green. One of my mentors, Bill Jennings (an ex-Mountie), was a friend of Cliff Green and he gave me a copy of Cliff's book which I think he said he had gotten directly from Cliff (but if the book was published after Green's death, that was probably incorrect).