skepticism

About sixty years ago, L. Sprague de Camp discovered a list of ancient magic tricks and stagecraft.

Most of the tricks employed by the witch Saphanbaal to awe her clients (in my novel) are described by Bishop Hippolytus in his Refutation of All Heresies. In the early third century, the bishop constituted himself a one-man Society for Psychical Research. He exposed the deceptions of magicians, such as putting lumps of alum in the fire and gluing fish scales to the ceiling. Of course, this was six hundred years after the time of my story. But, since some of the methods Hippolytus describes have been used by mediums right down to modern times, we may assume for the purposes of fiction that these sleights were already old when he revealed them.

“Author’s note,” L. Sprague de Camp, The Arrrows of Hercules (1965)