First edition. Octavo, original patterned blue cloth titled in gilt. Frontispiece with tissue guard plus 3 additional black & white plates inserted throughout the text, all by Cuneo. Bookplate on front endpaper and a date in ink, some small scratches to the cloth, minor stains to rear panel, a few small bumps. Overall, a clean, very good copy. The British edition is very uncommon. ¶ Weird mystery novel with supernatural elements. Discovery of a treasure hidden by Ninth Century Viking.