In my last annual message I communicated to Congress the circumstances under which the late minister of the United States suspended his official relations with the central Government and withdrew from the country. It was impossible to maintain friendly intercourse with a government like that at the capital, under whose usurped authority wrongs were constantly committed, but never redressed. Had this been an established government, with its power extending by the consent of the people over the whole of Mexico, a resort to hostilities against it would have been quite justifiable, and, indeed, necessary. But the country was a prey to civil war, and it was hoped that the success of the constitutional President might lead to a condition of things less injurious to the United States. This success became so probable that in January last I employed a reliable agent to visit Mexico and report to me the actual condition and prospects of the contending parties. In consequence of his report and from information which reached me from other sources favorable to the prospects of the constitutional cause, I felt justified in appointing a new minister to Mexico, who might embrace the earliest suitable opportunity of restoring our diplomatic relations with that Republic. For this purpose a distinguished citizen of Maryland was selected, who proceeded on his mission on the 8th of March last, with discretionary authority to recognize the Government of President Juarez if on his arrival in Mexico he should find it entitled to such recognition according to the established practice of the United States. On the 7th of April following Mr. McLane presented his credentials to President Juarez, having no hesitation "in pronouncing the Government of Juarez to be the only existing government of the Republic." He was cordially received by the authorities at Vera Cruz, and they have ever since manifested the most friendly disposition toward the United States. Unhappily, however, the constitutional Government has not been able to establish its power over the whole Republic. It is supported by a large majority of the people and the States, but there are important parts of the country where it can enforce no obedience.