In 1511, Ferdinand the Fifth, king of Spain, permitted them to be carried in greater numbers.

Ferdinand, however, must have been ignorant in these early times of the piratical manner in which the Portuguese had procured them.

He could have known nothing of their treatment when in bondage, nor could he have viewed the few uncertain adventurous transportations of them into his dominions in the western world, in the light of a regular trade.

After his death, however, a proposal was made by Bartholomew de las Casas, the bishop of Chiapa, to Cardinal Ximenes, who held the reins of the government of Spain till Charles the Fifth came to the throne, for the establishment of a regular system of commerce in the persons of the native Africans.

The object of Bartholomew de las Casas was undoubtedly to save the American Indians, whose cruel treatment and almost extirpation he had witnessed during his residence among them, and in whose behalf he had undertaken a voyage to the court of Spain.