[T]hey have invented idols, a manifest advance toward that polytheism and pantheism which lead through a triad and duad of deities to monotheism, the finial of the spiritual edifice.
1876, Richard F[rancis] Burton, “The Minor Tribes and the Mpongwe”, in Two Trips to Gorilla Land and the Cataracts of the Congo. […], part I (The Gaboon River and Gorilla Land), London: Sampson Low, Marston, Low, and Searle, […], page 96