1580-1640
1580-1640: During the period when Portugal and Spain were ruled by a single monarch, over 75 percent of all captives forced across the Atlantic were carried…
1580-1640: During the period when Portugal and Spain were ruled by a single monarch, over 75 percent of all captives forced across the Atlantic were carried in Portuguese ships. Most of these vessels operated from and returned to the burgeoning sugar economy of Brazil.
Source · p. 25, 43
Eltis & Richardson, Atlas, 25, 43