and remain his. [153] And further, we delegate to you the said power so that in our name, and in those of our heirs and successors, and of our kingdoms and seigniories, and the subjects and natives of them, you may affirm, concur in, approve, and arrange with the said King of Portugal and the said ambassadors and representatives acting in his name, that all seas, islands, and mainlands that may be and exist within the bound and demarcation of the coasts, seas, islands, and mainlands which shall be and remain ours and our successors’, may be ours and belong to our seigniory and conquest, and likewise to our kingdoms and the successors to the same, with such limitations and exceptions, [154] and with all other clauses and declarations that you deem best. [Furthermore we delegate the said powers] so that you may negotiate, authorize, contract, compact, approve, and accept in our name, and those of our said heirs and successors, and of all our kingdoms and seigniories, and the subjects and natives of the same, whatever covenants, contracts, and instruments of writing, with whatever bonds, decrees, forms, conditions, obligations, requirements, penalties, submissions, and renunciations you wish, and as may seem best to you, regarding all the aforesaid, and every part and parcel of the same, and every thing pertaining to it, or dependent upon it, or having even the slightest connection with it.  And in regard to the foregoing you shall have authority to enact and authorize, and you shall enact and authorize, all and singular, of whatever nature and quality, weight and importance, they may or can be, although they may be such as by their terms should require in addition our signature and especial order, and of which especial and express mention should be made fully, and which we, in our own proper persons, could enact, authorize, and approve.  Furthermore, we authorize you fully, to swear, and you shall swear, upon our consciences, that we, our heirs and successors, subjects, natives, and vassals, now and hereafter shall keep, observe, and fulfil, and that they shall keep, observe, and fulfil, really and effectually, all that you thus affirm, covenant, swear, authorize, and asseverate, without any deceit, fraud, duplicity, dissembling, or pretense.  And in this manner, you shall, in our name, covenant, asseverate, and promise that we, in our own person, shall asseverate, swear, promise, authorize, and affirm all that you, in our name, asseverate, promise, and covenant in regard to the preceding, within whatever term and space of time you deem best, and that we shall observe and fulfil this, really and effectually, and under the conditions, penalties, and obligations contained in the treaty of peace [155] concluded and ratified between ourselves and the said most serene King, our brother, and under all other conditions whatsoever promised and determined upon by you, for all of which we promise, from this date, to pay the penalty if we violate them.  For all the above, and each