H. Bedford-Jones, The Cross and the Hammer: A Tale of the Days of the Vikings (1912)
“ The day had steadily grown darker, with a rising wind. Suddenly a blaze of lightning fell athwart the sky, and Jarl Hakon's ship stood forth in the sight of all, wrapped in lambent flame, the Jarl himself standing triumphantly in the stern, grasping a hammer like that of Thor. A cry of horror arose from the Jomsvikings, who took the figure for that of the war god; and the lightning was followed by a thick hail, the stones as large as eggs, which burst full in the faces of the Jomsborg men. ”
