Only the members of the Contact Commission witnessed the activities of the "sleeping subject", and only they knew his identity. The individual is claimed to have been kept anonymous in order to prevent undesirable future veneration or reverence for him. Martin Gardner states that an explanation concerning the origin of the book more plausible than celestial beings is that the Contact Commission, particularly William Sadler, was responsible. Gardner's conclusion is that a man named Wilfred Kellogg was the sleeping subject and authored the work from his subconscious mind, with William Sadler subsequently editing and authoring parts. Brad Gooch believes Sadler wrote the book, possibly with help from others on the Contact Commission. A statistical analysis using the Mosteller and Wallace methods of stylometry indicates at least nine authors were involved, and by comparatively analyzing the book against "The Mind at Mischief", does not indicate authorship or extensive editing by Sadler, without ruling out the possibility of limited edits.