Northern Irish Spiritualist group said to produce striking psychic phenomena, the subject of detailed experiments by William Crawford in the 1910s.

Icelandic trance medium (1914-1977) who was investigated in the 1970s by Erlendur Haraldsson, and who produced notable examples of 'drop-in' communications and xenoglossy. 

Englishwoman (1895-1980) who wrote a memoir describing her frequent psychic experiences, often in relation to healing and family matters.

Report of a controversial investigation by the newly founded Society for Psychical Research, which concluded that claims of seance-type phenomena relating to leaders of Theosophy, principally Helena Blavatasky, were false. 

Daniel Dunglas Home (1833-1886) was perhaps the best-known spirit medium of the nineteenth century, associated with a wide range of psychokinetic phenomena, of which some were observed in controlled conditions. 

Icelandic trance medium (1883-1910) who produced physical phenomena of strength and variety comparable to that of DD Home. The phenomena were closely observed and detailed records were kept; no fraudulent behaviour was ever reported. 

Communications through a trance medium purporting to come from the surviving spirit of a recently deceased teenager, that were highly evidential and are often cited as convincing evidence of survival of death. 

Russian psychic investigated in the late 1920s for her ability to cause words and images that she received telepathically from other people to appear briefly as red marks on her skin. 

Polish banker (1873-1943) who exhibited psychic abilities and for some years submitted to investigation as a materialization medium. His séances were notable for producing wax moulds of ectoplasmic forms. 

British trance medium who collaborated with investigators of the Society for Psychical Research in the 1920s and 1930s, notable for innovative approaches such as proxy sittings and book tests.