A book by the French consul in Mosul on the Sabaeans, Soubbas, Mandaeans or Christians of Saint John: their history - as they tell it - their descent from the invisible Adam, the legislator Yahio (John the Baptist), the Muslim persecution, and the hero Dananoukh; their religion, with Alaha as Supreme Being; their liturgy, clergy, and rituals: baptism, churching, eucharist, marriage, and funerals; rituals and customs; traditions of Jesus and Solomon, of the Flood, the Second Coming, and the catastrophes; their calendar and astrology; alphabet and language; and their current numbers and economic position. With a detailed description of the pre-existing literature.