Great confidence is entertained that the late treaty with Spain, which has been ratified by both the parties, and the ratifications whereof have been exchanged, has placed the relations of the two countries on a basis of permanent friendship. The provision made by it for such of our citizens as have claims on Spain of the character described will, it is presumed, be very satisfactory to them, and the boundary which is established between the territories of the parties westward of the Mississippi, heretofore in dispute, has, it is thought, been settled on conditions just and advantageous to both. But to the acquisition of Florida too much importance can not be attached. It secures to the United States a territory important in itself, and whose importance is much increased by its bearing on many of the highest interests of the Union. It opens to several of the neighboring States a free passage to the ocean, through the Province ceded, by several rivers, having their sources high up within their limits. It secures us against all future annoyance from powerful Indian tribes. It gives us several excellent harbors in the Gulf of Mexico for ships of war of the largest size. It covers by its position in the Gulf the Mississippi and other great waters within our extended limits, and thereby enables the United States to afford complete protection to the vast and very valuable productions of our whole Western country, which find a market through those streams. By a treaty with the British Government, bearing date on the 20th of October, 1818, the convention regulating the commerce between the United States and Great Britain, concluded on the 3d of July, 1815, which was about expiring, was revived and continued for the term of ten years from the time of its expiration. By that treaty, also, the differences which had arisen under the treaty of Ghent respecting the right claimed by the United States for their citizens to take and cure fish on the coast of His Britannic Majesty's dominions in America, with other differences on important interests, were adjusted to the satisfaction of both parties. No agreement has yet been entered into respecting the commerce between the United States and the British dominions in the West Indies and on this continent. The restraints imposed on that commerce by Great Britain, and reciprocated by the United States on a principle of defense, continue still in force. The negotiation with France for the regulation of the commercial relations between the two countries, which in the course of the last summer had been commenced at Paris, has since been transferred to this city, and will be pursued on the part of the United States in the spirit of conciliation, and with an earnest desire that it may terminate in an arrangement satisfactory to both parties.