Mexico continues to be a theater of civil war. While our political relations with that country have undergone no change, we have at the same time strictly maintained neutrality between the belligerents. At the request of the States of Costa Rica and Nicaragua, a competent engineer has been authorized to make a survey of the river San Juan and the port of San Juan. It is a source of much satisfaction that the difficulties which for a moment excited some political apprehensions and caused a closing of the interoceanic transit route have been amicably adjusted, and that there is a good prospect that the route will soon be reopened with an increase of capacity and adaptation. We could not exaggerate either the commercial or the political importance of that great improvement. It would be doing injustice to an important South American State not to acknowledge the directness, frankness, and cordiality with which the United States of Colombia have entered into intimate relations with this Government. A claims convention has been constituted to complete the unfinished work of the one which closed its session in 1861. The new liberal constitution of Venezuela having gone into effect with the universal acquiescence of the people, the Government under it has been recognized and diplomatic intercourse with it has opened in a cordial and friendly spirit. The long-deferred Aves Island claim has been satisfactorily paid and discharged. Mutual payments have been made of the claims awarded by the late joint commission for the settlement of claims between the United States and Peru. An earnest and cordial friendship continues to exist between the two countries, and such efforts as were in my power have been used to remove misunderstanding and avert a threatened war between Peru and Spain. Our relations are of the most friendly nature with Chile, the Argentine Republic, Bolivia, Costa Rica, Paraguay, San Salvador, and Hayti. During the past year no differences of any kind have arisen with any of those Republics, and, on the other hand, their sympathies with the United States are constantly expressed with cordiality and earnestness. The claim arising from the seizure of the cargo of the brig Macedonian in 1821 has been paid in full by the Government of Chile. Civil war continues in the Spanish part of San Domingo, apparently without prospect of an early close. Official correspondence has been freely opened with Liberia, and it gives us a pleasing view of social and political progress in that Republic. It may be expected to derive new vigor from American influence, improved by the rapid disappearance of slavery in the United States.