Frank Aubrey was a pseudonym of Francis Henry Atkins (1847-1927), who contributed widely to the pre-science fiction pulp magazines, writing at least three Lost-World novels along with much else. The first and most successful of the three was The Devil Tree of El Dorado: A Romance of British Guiana, which capitalized on the contemporary interest in the Roraima Plateau lying athwart the disputed border between Venezuela and the British colony; Monella, the mysterious giant who leads Europeans to their goal, turns out to be the 2000 year old ex-king of all they now survey, and a kind of Wandering Jew.