The Works of Sir William Crookes
- 1868 A Course of Six Lectures on the Various Forces of Matter
- 1871 Experiments on Psychic Force
- Journal of Science, January 1871, page 471.
- 1874 Psychic Force and Modern Spiritualism
- 1874 Researches In The Phenomena Of Spiritualism
- 1904 Researches into the Phenomena of Spiritualism