Heu-Heu

In this Allan Quatermain romance set in South Africa, the Zulu wizard Zikali sends the hunter and his companion Hans on a quest into the South African wilderness to retrieve leaves from the Tree of Illusions. On the way, they encounter a lost civilization and the legend of Heu-Heu, an ape-like monster.
Hutchinson's Magazine serialized Heu-Heu between January and March 1924 (Vol 10, Nos 55 to 57). In 1924 Hutchinson, London, published Heu-Heu. Doubleday, Page and Co., New York, published the first American Edition that same year. I know of no illustrated editions of Heu-Heu, although several editions have lushly illustrated dust jackets and book covers.
Hutchinson's Magazine serialized Heu-Heu between January and March 1924 (Vol 10, Nos 55 to 57). In 1924 Hutchinson, London, published Heu-Heu. Doubleday, Page and Co., New York, published the first American Edition that same year. I know of no illustrated editions of Heu-Heu, although several editions have lushly illustrated dust jackets and book covers.
Further Reading
Pocock, Tom. Rider Haggard and the Lost Empire. London: Weidenfeld and Nicolson, 1993.