 His precise role in the creation of the Icelandic text remained a riddle until March 2017, when it became clear that it was a shortened and modified translation (with Icelandic elements added) of an earlier "Dracula" variant serialized in the Swedish newspaper "Aftonbladets Halfvecko-Upplaga" in 1899–1900.The annotated English translation of "Makt myrkranna" by Hans Corneel de Roos was released on 7 February 2017.The Swedish text of "Mörkrets makter" was published as a book in Sweden in November 2017 by Rickard Berghorn's Aleph Bokförlag, based on a longer variant serialized in the newspaper "Dagen" (1899-1900) and republished in the magazine "Tip-Top" (1916-1918).