'This mortgage we have made, and do make, in consideration of the repayment of the sum of two hundred thousand golden crowns of full weight, and of the current coin, and which neither we nor our successors shall be enabled to recover again, by repayment of the said two hundred thousand crowns, from our said brother and cousin during their natural lives; but it may be lawful for us, or our successors, to recover these lands from the direct heirs of our said brother and cousin, or from their heirs descending in a direct line, who may be in the possession of them, on paying back the said sum of two hundred thousand crowns. For the security of our being enabled to make such repurchase, our said brother and cousin shall deliver to us letters-patent, in due form, for the better confirmation of the same; and we will and understand that our said brother and cousin, and their legal heirs, that may be in the possession of these territories, shall have full powers to nominate and appoint, at their pleasure, all and every officer that shall be necessary for the government and regulation of these said towns and countries; and that such officers as shall be necessary for the collecting of all royal taxes, aids, or impositions, shall be nominated by us, at the recommendation of our said brother and cousin, and their heirs, as was done during the time our said uncle of Burgundy held these towns and countries. 'Whereas, by the treaty of Arras, it was agreed, among other articles, that the county of Boulogne should remain to our uncle of Burgundy, and the heirs male of his body lawfully begotten,--and whereas our late lord and father bound himself to recompense all who claimed any right to it,--we, for the causes and considerations before mentioned, and without derogating from the treaty of Arras, confirm the above article respecting the county of Boulogne, and declare that our said brother and cousin, their heirs, male or female, lawfully begotten by them, shall hold, during their lives only, the said county of Boulogne, in the form and manner specified in the treaty of Arras, and that they may reap the same advantages from it as if it were their own proper inheritance. And we engage to make those consent to the same, who may claim any right to the said county, and give them such compensation as we shall judge proper, so that our said brother, cousin, and their heirs, shall have peaceable possession of the same.