With exclusive rights over the sale of slaves in that part of Africa, De Souza soon amassed a fortune, and the slave market, situated near his house, became a hub for foreign and local buyers.
Karena punya kendali penuh atas pemasaran budak di bagian Afrika itu, De Souza menjadi kaya mendadak, dan pasar budak di dekat rumahnya menjadi basis para pembeli asing dan lokal.