friend tried to trap Indriði by singing a duet with one of the voices and setting the pitch uncomfortably high, but concluded it was "very improbable that there was in the whole town a singer who could" have sung as well as the voice did. Spiritualists considered Indriði primarily a physical medium, and say he correctly reported pieces of information, such as a big fire in Copenhagen. In winter 1906-07, the Society held "apport séances" in Kvaran's home during which Indriði allegedly materialized objects from all over Reykjavík. He himself was also reportedly teleported from one locked room to another on one occasion. Proponents claim that Indriði's left arm "dematerialized" several times in December 1906 and that up to seven witnesses at a time swore that they could not find it, even striking matches and shining lights on his body. After Indriði's visit to the Westman Islands in September 1907, Spiritualists say he was plagued by poltergeist and levitation phenomena that he and his controls attributed to a man named Jón, whom he had seen and made insulting remarks about. Supposedly, Indriði and the wicker chair he was sitting in were carried over two rows of people; the harmonium moved while the organist was playing it; at night, Indriði's bed and Indriði himself were levitated. According to the story, observers were unable to hold his legs down or on one occasion to prevent his being dragged into another room. It was claimed that objects were thrown around the bedroom of the Experimental House and to a lesser extent at Kvaran's house, breaking lamps and wash-basins and causing the observers to grab Indriði and flee. According to Haraldur Níelsson's account to the Second International Congress for Psychical Research, Jón was thought to be a recent suicide. Proponents dismissed accusations of fraud against Indriði as not coming from first-hand witnesses. Believers included Guðmundur Hannesson, founder of the Icelandic Scientific Society and twice president of the University of Iceland. Another was Haraldur Níelsson, a Spiritist and active member of the Spiritualist Society of Iceland, who was at the time the nephew of the Bishop of Iceland and wrote on Indriði and presented on him at international Spiritualist conferences. Criticism The Experimental Society's claims of Indriði's alleged abilities were the topics of controversy in the Icelandic press. Fjallkonen condemned a supposed "healing operation" in which an individual died after Indriði attempted to cure him