Ibid is a parody by American horror fiction writer H. P. Lovecraft. Ibid is a mock biography of the Roman scholar Ibidus (486-587), whose masterpiece was Op. Cit., "wherein all the significant undercurrents of Graeco-Roman thought were crystallized once and for all." The piece traces the skull of Ibidus, once the possession of Charlemagne, William the Conqueror and other notables, to the United States, where it travels via Salem, Massachusetts and Providence, Rhode Island to a prairie dog hole in Milwaukee, Wisconsin.