by Harry Houdini
by Immanuel Kant
by Joel Tiffany
by Arthur Conan Doyle
by Arthur Conan Doyle
by Camille Flammarion
by Florence Marryat
by Beckles Willson
by E. Katherine (Emily Katherine) Bates
by Luigi Capuana
by Robert Hare
by F.A.S. Ph.D. James Coates
by A. Leah (Ann Leah) Underhill
by J. L. Kennon
by Sir Oliver Lodge
by Arthur Conan Doyle
by Michael Sage
by Arthur Conan Doyle
by E. H. (Elias Henry) Jones
by Harriet Beecher Stowe, Samuel R. (Samuel Roberts) Wells
by Hamlin Garland
by Reuben Briggs Davenport
by Thomas Olman Todd
by Andrew Lang
by Allen Putnam
by Uriah Smith
by Samuel B. (Samuel Bulfinch) Emmons
by Henry Ridgely Evans
by Théodore Flournoy
by Edward Augustus Brackett
by University of Pennsylvania. Seybert Commission for Investigating Modern Spiritualism
by George Cruikshank
by C. Vincent Patrick, W. Whately (Walter Whately) Smith
by Chung Ling Soo
by Millais Culpin
by Alfred Russel Wallace
by Joseph McCabe
by Francis Grierson
by Maurice Maeterlinck
by Charles Grafton Page
by Andrew B. (Andreas Bernardus) Smolnikar
by Birger Schöldström