The Portugal history, or, A relation of the troubles that happened in the court of Portugal in the years 1667 and 1668 : in which is to be seen that great transaction of the renunciation of the crown by Alphonso the Sixth, the dissolution of his marriage with the Princess Maria Frances Isabella of Savoy : the marriage of the same princess to the Prince Don Pedro, regent of the realm of Portugal, and the reasons alledged at Rome for the dispensation thereof /