 The slave owners' third choice was for slaves from Congo, Mantenga, Cambado, Misanga, Mozambique, Madagascar, Angola, Terranova (who were probably bought in Porto-Novo, Benin) and Mina.In the 17th century some owners began the process of manumission of people of color.In some cases, slaves were allowed to buy their freedom, and a free Afro-Peruvian social class emerged.