Every scientist who has investigated thoroughly and without prejudice has been convinced of the truth of these facts. Some of the greatest minds, such as Sir Arthur Conan Doyle, Alfred Russell Wallace, Sir William Crookes (discoverer of the x-ray), Camille Flammarion, William T. Stead and Sir Oliver Lodge of England, Edgar Lucien Larkin, of Mt. Lowe Observatory, and other world-famous scientific men have announced themselves convinced.