His knowledge of Daemonheim is shown throughout a series of letters written to Thok and his younger sister, Bryll. The letters were a method to keep his sanity while traversing the endless and nightmarish floors of Daemonheim, as well as hopefully record the progress their journey had accomplished for future study. Marmaros also named one of the types of ore he discovered in Daemonheim after himself and a type of clothing texture after his sister.