His Catholick’s majesty full power
DON CARLOS, by the grace of God, King of Castille, of Leon, of Arragon, of the two Sicilies, of Jerusalem, of Navarre, of Granada, of Toledo, of Valencia, of Galicia, of Majorca, of Seville, of Sardinia, of Cordova, of Corsica, of Murcia, of Jaen, of the Algarves. of Algecira. of Gibraltar. of the Canary Islands, of the East and West Indies, Islands and Continent, of the Ocean, Arch Duke of Austria, Duke of Burgundy, of Brabant and Milan, Count of Hapsburg, of Flanders, of Tirol and Barcelona, Lord of Biscay and of Molino, c. Whereas preliminaries of a solid and lasting peace between this Crown, and that of France on the one part, and that of England and Portugal on the other, were concluded and signed in the Royal Residence of Fontainbleau, the 3rd of November of the present year, and the respective ratifications thereof exchanged on the 22d of the same month, by Ministers authorised for that purpose, wherein it is promised, that a definitive treaty should be forthwith entered upon, having established and regulated the chief points upon which it is to turn: and whereas in the same manner as I granted to you, Don Jerome Grimaldi, Marquis de Grimaldi, Knight of the Order of the Holy Ghost, Gentleman of my Bedchamber with employment, and my Ambassador Extraordinary to the Most Christian King, my full power to treat, adjust, and sign the beforementioned preliminaries, it is necessary to grant the same to you, or to some other, to treat, adjust, and sign the promised definitive treaty of peace as aforesaid: therefore, as you the said Don Jerome Grimaldi, Marquis de Grimaldi, are at the convenient place, and as I have every day fresh motives, from your approved fidelity and zeal, capacity and prudence, to entrust to you this, and otherlike concerns of my Crown, I have appointed you my Minister Plenipotentiary, and granted to you my full power, to the end, that, in my name, and representing my person, you may treat, regulate, settle, and sign the said definitive treaty of peace between my Crown and that of France on the one part, that of England and that of Portugal on the other, with the Ministers who shall be equally and specially authorised by their respective Sovereigns for the same purpose; acknowledging, as I do from this time acknowledge, as accepted and ratified, whatever you shall so treat, conclude, and sign; promising, on my Royal Word, that I will observe and fulfil the same, will cause it to be observed and fulfilled, as if it had been treated, concluded, and signed by myself. In witness whereof, I have caused these presents to be dispatched, signed by my hand, sealed with my privy seal, and countersigned by my underwritten Counsellor of State, and first Secretary for the department of State and of War. Buen Retiro, the 10th day of December, 1762.
(Signed) I THE KING.
(And lower) Richard Wall
The information about this treaty is taken from this website here: https://www.landofthebrave.info/1763-treaty-of-paris-text.htm