Catherine Elise Muller
|Born||9 December 1861|
|Died||10 June 1929 (67)|
|Known for||"From India to the Planet Mars" (1900)|
Catherine Elise Muller (December 9, 1861 - June 10, 1929), also known as Hélène Smith (the pseudonym used by Théodore Flournoy in his "From India to the Planet Mars"), was a Swiss trance medium who claimed to have astrally travelled to ancient times and other planets in the solar system, particularly Mars.