In 1517, Fray Bartolome de las Casas, feeling great pity for the Indians who grew worn and lean in the drudging infernos of the Antillean gold mines, proposed to Emperor Charles V that Negroes be brought to the isles of ...In 1517, Fray Bartolome de las Casas, feeling great pity for the Indians who grew worn and lean in the drudging infernos of the Antillean gold mines, proposed to Emperor Charles V that Negroes be brought to the isles of the Caribbean, so that they might grow worn and lean in the drudging infernos of the Antillean gold mines.