The Devil-Tree of El Dorado, an adventure novel first published in 1897, is set in the fictional land of El Dorado in South America. The story follows the protagonist, Dr. David Haldane, who discovers a lost civilization ruled by the despot Queen Guatavita. The novel is filled with thrilling encounters, including the mysterious and deadly Devil-Tree, which plays a central role in the plot. Aubrey's work is a blend of science fiction and adventure, characteristic of the late 19th century.