Copies of the instructions to the commanding general, of his correspondence with the Secretary of War, explaining his motives and justifying his conduct, with a copy of the proceedings of the courts-martial in the trial of Arbuthnot and Ambristie, and of the correspondence between the Secretary of State and the minister plenipotentiary of Spain near this Government, and of the minister plenipotentiary of the United States at Madrid with the Government of Spain, will be laid before Congress. The civil war which has so long prevailed between Spain and the Provinces in South America still continues, without any prospect of its speedy termination. The information respecting the condition of those countries which has been collected by the commissioners recently returned from thence will be laid before Congress in copies of their reports, with such other information as has been received from other agents of the United States. It appears from these communications that the Government at Buenos Ayres declared itself independent in July, 1816, having previously exercised the power of an independent Government, though in the name of the King of Spain, from the year 1810; that the Banda Oriental, Entre Rios, and Paraguay, with the city of Santa Fee, all of which are also independent, are unconnected with the present Government of Buenos Ayres; that Chili has declared itself independent and is closely connected with Buenos Ayres; that Venezuela has also declared itself independent, and now maintains the conflict with various success; and that the remaining parts of South America, except Monte Video and such other portions of the eastern bank of the La Plata as are held by Portugal, are still in the possession of Spain or in a certain degree under her influence. By a circular note addressed by the ministers of Spain to the allied powers, with whom they are respectively accredited, it appears that the allies have undertaken to mediate between Spain and the South American Provinces, and that the manner and extent of their interposition would be settled by a congress which was to have met at Aix-la-Chapelle in September last. From the general policy and course of proceeding observed by the allied powers in regard to this contest it is inferred that they will confine their interposition to the expression of their sentiments, abstaining from the application of force. I state this impression that force will not be applied with the greater satisfaction because it is a course more consistent with justice and likewise authorizes a hope that the calamities of the war will be confined to the parties only, and will be of shorter duration. From the view taken of this subject, founded on all the information that we have been able to obtain, there is good cause to be satisfied with the course heretofore pursued by the United States in regard to this contest, and to conclude that it is proper to adhere to it, especially in the present state of affairs.