In 1906 his psychic abilities were also investigated by the Experimental Society founded by Einar Hjörleifsson Kvaran: as a clairvoyant, he succeeded in divining the contents of closed books, and as an automatic writer he penned works supposedly by Hans Christian Andersen, Jónas Hallgrímsson, and Snorri Sturluson.
In 1914 he published his first play, Hadda Padda which was endorsed by Georg Brandes and shown in the Danish Royal Theatre with Kamban as assistant director.
He is also the author of spirited and erudite historical novels based on the Icelandic sagas, including Skalholt (4 vols., 1930–32; tr.
Kamban directed plays, wrote novels and produced motion pictures in Copenhagen until 1934, when he moved to London.
[3][4] On 5 May 1945, as the German forces in Denmark surrendered, Kamban was murdered at a Copenhagen restaurant in front of his wife and daughter, by Danish partisans.