Mr.Ralph's History, vol.i.

p.
176.
Before the parliament rose, the court was employed in making preparations for the reception of the new queen, Catharine of Portugal, to whom the king was betrothed, and who had just landed at Portsmouth.
During the time that the protector carried on the war with Spain, he was naturally led to support the Portuguese in their revolt; and he engaged himself by treaty to supply them with ten thousand men for their defence against the Spaniards.

On the king's restoration, advances were made by Portugal for the renewal of the alliance; and in order to bind the friendship closer, an offer was made of the Portuguese princess, and a portion of five hundred thousand pounds, together with two fortresses, Tangiers in Africa, and Bombay in the East Indies.

Spain, who, after the peace of the Pyrenees, bent all her force to recover Portugal, now in appearance abandoned by France, took the alarm, and endeavored to fix Charles in an opposite interest The Catholic king offered to adopt any other princess as a daughter of Spain, either the princess of Parma, or, what he thought more popular, some Protestant princess, the daughter of Denmark, Saxony, or Orange; and on any of these he promised to confer a dowry equal to that which was offered by Portugal.

But many reasons inclined Charles rather to accept of the Portuguese proposals.