been _secret_, thus became _patent_, and part of the known law of nations. In the year 1814, in consequence of the happy conclusion of the war, the option was afforded to the King of Portugal of returning to his European dominions. It was then felt that, as the necessity of his most faithful Majesty’s absence from Portugal had ceased, the ground for the obligation originally contracted in the secret convention of 1807, and afterward transferred to the patent treaty of 1810, was removed. The treaty of 1810 was, therefore, annulled at the Congress of Vienna; and in lieu of the stipulation not to acknowledge any other sovereign of Portugal than a member of the House of Braganza, was substituted that which I have just read to the House. Annulling the treaty of 1810, the treaty of Vienna renews and confirms (as the House will have seen) all _former_ treaties between Great Britain and Portugal, describing them as “ancient treaties of alliance, friendship, and guarantee”; as having “long and happily subsisted between the two Crowns”; and as being allowed, by the two high contracting parties, to remain “in full force and effect.” What, then, is the force—what is the effect of those ancient treaties? I am prepared to show to the House what it is. But before I do so, I must say, that if all the treaties to which this article of the treaty of Vienna refers, had perished by some convulsion of nature, or had by some extraordinary accident been consigned to total oblivion, still it would be impossible not to admit, as an incontestable inference from this article of the treaty of Vienna alone, that, in a moral point of view, there is incumbent on Great Britain a decided obligation to act as the effectual defender of Portugal. If I could not show the letter of a single antecedent stipulation, I should still contend that a solemn admission, only ten years old, of the existence at that time of “treaties of alliance, friendship, and guarantee,” held Great Britain to the discharge of the obligations which that very description implies. But fortunately there is no such difficulty in specifying the nature of those obligations. All of the preceding treaties exist—all of them are of easy reference—all of them are known to this country, to Spain, to every nation of the civilized world. They are so numerous, and their general result is so uniform, that it may be sufficient to select only two of them to show the nature of all.