Found it! It is called a psychomanteum and lifeafterlife.com has an interview with Moody and a few others about it.
Sounds like a form of scrying with a mirror. It’s a very dangerous practice as people don’t have discernment, get fooled and burned.
I have a hard time believing that Raymond would be dumb enough to do it. I’ve observed other people that did similar things and it brought much evil into their lives. Previously they were good people.
Contacting spirits without a higher connection is like calling a public telephone in New York City. You have no idea who answers or the purity of their motive.
There are a lot of imitator spirits. I’ve encountered them many times over the years.
Thanks for going to the effort to find it. I will read it and ask Raymond about it the next time I see him.