A convention with Mexico for extending the time for the appointment of commissioners to run the boundary line has been concluded and will be submitted to the Senate. Recent events in that country have awakened the liveliest solicitude in the United States. Aware of the strong temptations existing and powerful inducements held out to the citizens of the United States to mingle in the dissensions of our immediate neighbors, instructions have been given to the district attorneys of the United States where indications warranted it to prosecute without respect to persons all who might attempt to violate the obligations of our neutrality, while at the same time it has been thought necessary to apprise the Government of Mexico that we should require the integrity of our territory to be scrupulously respected by both parties. From our diplomatic agents in Brazil, Chile, Peru, Central America, Venezuela, and New Granada constant assurances are received of the continued good understanding with the Governments to which they are severally accredited. With those Governments upon which our citizens have valid and accumulating claims, scarcely an advance toward a settlement of them is made, owing mainly to their distracted state or to the pressure of imperative domestic questions. Our patience has been and will probably be still further severely tried, but our fellow citizens whose interests are involved may confide in the determination of the Government to obtain for them eventually ample retribution. Unfortunately, many of the nations of this hemisphere are still self-tormented by domestic dissensions. Revolution succeeds revolution; injuries are committed upon foreigners engaged in lawful pursuits; much time elapses before a government sufficiently stable is erected to justify expectation of redress; ministers are sent and received, and before the discussions of past injuries are fairly begun fresh troubles arise; but too frequently new injuries are added to the old, to be discussed together with the existing government after it has proved its ability to sustain the assaults made upon it, or with its successor if overthrown. If this unhappy condition of things continues much longer, other nations will be under the painful necessity of deciding whether justice to their suffering citizens does not require a prompt redress of injuries by their own power, without waiting for the establishment of a government competent and enduring enough to discuss and to make satisfaction for them. Since the last session of Congress the validity of our claims upon France, as liquidated by the treaty of 1831, has been acknowledged by both branches of her legislature, and the money has been appropriated for their discharge; but the payment is, I regret to inform you, still withheld. A brief recapitulation of the most important incidents in this protracted controversy will shew how utterly untenable are the grounds upon which this course is attempted to be justified.