This League, with all and every thing therein contained, shall be
confirmed and ratified by the said King of _Great Britain_, and the said
_States General_ of the _United Provinces_, by Letters Patents of both
Parties, sealed with their Great Seal in due and authentick Form, within
four Weeks next ensuing, or sooner, if it may be; and the mutual
Instruments of Ratification shall be exchanged on each part within the
said time.