I saw Dr. Beaumont perform his three shell routine at the Atlanta Harvest of Magic sometime in the early 1980s. I don't have any direct knowledge of who he is but perhaps Dan Garrett would know -- he was around at that time. I remember the routine as being very entertaining. I still remember the spiel he used: "Hey diddle diddle, the pea is in the middle. When the money is down, the pea can't be found."