Dr. Gustave Geley was a doctor on the Faculty of Medicine of Lyon and Director of the Institut Metapsychique International from 1919 to 1924.

Geley was a very keen and indefatigable investigator; when, under fraud-proof circumstances, supernormal results were produced in his laboratory he had to defend himself against the accusation of medical colleagues that he was an accomplice of mediums. He actually consented to have his premises examined for secret doors and to being chained up with other investigators. (http://www.survivalafterdeath.org/researchers/geley.htm)