Disputed

Eusapia Palladino, an Italian medium, died on 16 May 1918. Investigators reported phenomena at her sittings, while the 1895 Cambridge series found her cheating.

Hans Bender, the German parapsychologist who founded the Freiburg institute for frontier areas of psychology, died on 7 May 1991. He led the research on the Rosenheim poltergeist case of 1967-68.

Johann Georg Schröpfer, a Leipzig ghost-raiser, was found dead on 8 October 1774 after a gunshot was heard during a walk with associates. He was buried the same day in the hospital's burial ground for suicides.

Margaret Hogan, an 89-year-old widow living alone on Prussia Street in Dublin, was found dead after a fire in her house on 28 March 1970.

Stanton T. Friedman, a nuclear physicist turned UFO lecturer, died on 13 May 2019 in Toronto at the age of 84.

Mina Crandon, the medium known as Margery, died on 1 November 1941. She said she spoke for her dead brother, and Houdini challenged her.

Rudi Schneider, a medium tested by investigators decades earlier, died suddenly at Weyer on 28 April 1957. By then he worked as a mechanic.

The Navy collier USS Cyclops was last seen at Barbados on 4 March 1918, bound for Baltimore, and was never found.

John Fian, a schoolmaster accused in the North Berwick witch case, was tortured, strangled and burned on Castlehill in Edinburgh on 27 January 1591.

Louis Gaufridi, a Provence priest accused of bewitching a nun, was executed at Aix-en-Provence on 30 April 1611 after confessing under torture to sorcery.

The airliner Star Ariel disappeared over the Atlantic on 17 January 1949 while flying from Bermuda to Kingston, Jamaica.

The airliner Star Tiger vanished over the Atlantic in the early hours of 30 January 1948, travelling between the Azores and Bermuda.

Tim Dinsdale filmed a humped object crossing Loch Ness on 23 April 1960, the last day of his expedition. Later analysts disagreed about what the film shows.

Twain was born in 1835 and died on 21 April 1910, both years Halley's Comet passed. In 1909 he said he expected to leave with it.

W. T. Stead wrote of a liner sinking before the Titanic, and died aboard it on 15 April 1912. A medium's sitting after his death was reported by a vice-admiral.