Jesuit priest Alonso de Sandoval's important 1627 missionary history, the only existing published document that deals with Africans in the Americas at such an early date, describes a means to salvation for Jesuits and Africans alike in the New World. Margaret Olsen's fascinating examination of the treatise creates a vivid picture of the Jesuit "slaves of Christ" as well as the Christianization of Africans brought to Cartagena de Indias, the primary port of entry of slaves bound for the colonies at the time. Sandoval, who was critical of the slave trade in early Spanish America, was interested...