Sixtus IV,
European Treaties bearing on the History of the United States and its Dependencies to 1648
(1917)
“ Moreover, the King and Queen of Castile and Leon, promised and agreed, in the manner abovesaid, for themselves and for their successors, not to concern themselves to interfere in any manner with the conquest of the kingdom of Fez, just as the former sovereigns of Castile, their predecessors, abstained from meddling with it; but the said lords, king and prince of Portugal, and their kingdoms and successors shall have a free hand to prosecute the said conquest and to defend it as they please. ”
