Louis Feuillade had already made two popular earlier serials, Fantômas (1913) and Les Vampires (1915) which were popular with audiences, but drew criticism for glorifying criminals.
In "The Judex Codex" (published in The Shadow of Judex, 2013), the writer Dennis E. Power says that Quatermain had a daughter by Ayesha; this reconciles Quatermain's family tree with the Allan Quatermain comic book series created by Alfredo Castelli.