Debunking Margery the Medium
In the wake of WWI many people began searching for ways to contact the deceased. Several mediums exploited their desperation, and one of the most famous was Mina Crandon, known to fans as Margery. As part of the Scientific American committee investigating spiritualism,
Houdini attended one of Crandon’s séances and prepared by tying a bandage under his right knee. The constriction made his skin tender, enabling him to feel when Crandon, who was sitting next to him, shifted and flexed her feet to ring a bell and move a table in the dark, exposing her as a fraud.