In "The Judex Codex" (published in The Shadow of Judex, 2013), 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.
Rick Lai noted (in his essay "The Mystery of Harry Quatermain and Other Conundrums") several discrepancies throughout the Haggard series regarding Quatermain's wives.