Mary, her half-sister Claire Clairmont, and Percy Bysshe Shelley are said to have visited Castle Frankenstein, on their way to Lake Geneva. Other historians, whether their field of research is Grimm, Shelley, or the Castle Frankenstein, do not see any evidence for this. Scheele's claimed letter of Grimm is nowhere to be found. And no evidence can be found that Clairmont was considered the translator for Grimm's Fairy Tales. Several nonfiction books on the life of Mary Shelley also confirm Dippel as a possible influence. In particular, Miranda Seymour finds it curious that Mary speaks of "gods [making entirely] new men" in her journal so soon after her travels through the regions surrounding Castle Frankenstein; if rumors indeed existed throughout the area that Dippel experimented on cadavers in an attempt to create life, Seymour argues, Mary's phrasing could be more than merely coincidental. In his book Frankenstein: The First 200 Years, Christopher Frayling refers to a passage in Mary's diaries later in her life in which she expresses a desire to return to the region surrounding Castle Frankenstein to take in more of its folklore—implying that she is already familiar with at least some of the local legends. For now, however, the connection remains a subject of an ongoing debate. Later Dippel–Frankenstein connections Regardless of the historical validity of the connection, however, Dippel's status as Frankenstein's prototype seems assured in current popular culture (similar to Count Dracula's equally controversial interchangeability with the historical Vlad the Impaler). In addition to Florescu's speculative work, the Dippel/Frankenstein merging has appeared in several works of fiction: Robert Anton Wilson's fantasy novel The Earth Will Shake features Dippel as a monster-making, globe-hopping magician who calls himself Frankenstein; the science fiction novel The Frankenstein Murders portrays Dippel as an assistant to Victor Frankenstein; Topps' three-part comic book miniseries The Frankenstein-Dracula War lists Dippel as one of Dr. Frankenstein's chief inspirations; Warren Ellis's graphic novel Frankenstein's Womb hypothesizes that Shelley indeed visited Castle Frankenstein and heard of Dippel before writing her famous work; Christopher Farnsworth's debut novel Blood Oath features a vampire trying to stop an immortal Dippel (who had once worked for Adolf Hitler) from creating a Frankenstein-like army; G.M.S. Altman's novel Dippel's Oil features a kindhearted Dippel living in modern times, bemused at his influence on the Frankenstein myth; Larry Correia's novel Monster Hunter Vendetta makes reference to Dippel as the creator of an enigmatic