Early in the present year official notes were received from the ministers of France and England inviting the Government of the United States to become a party with Great Britain and France to a tripartite convention, in virtue of which the three powers should severally and collectively disclaim now and for the future all intention to obtain possession of the island of Cuba, and should bind themselves to discountenance all attempts to that effect on the part of any power or individual whatever. This invitation has been respectfully declined, for reasons which it would occupy too much space in this communication to state in detail, but which led me to think that the proposed measure would be of doubtful constitutionality, impolitic, and unavailing. I have, however, in common with several of my predecessors, directed the ministers of France and England to be assured that the United States entertain no designs against Cuba, but that, on the contrary, I should regard its incorporation into the Union at the present time as fraught with serious peril. Were this island comparatively destitute of inhabitants or occupied by a kindred race, I should regard it, if voluntarily ceded by Spain, as a most desirable acquisition. But under existing circumstances I should look upon its incorporation into our Union as a very hazardous measure. It would bring into the Confederacy a population of a different national stock, speaking a different language, and not likely to harmonize with the other members. It would probably affect in a prejudicial manner the industrial interests of the South, and it might revive those conflicts of opinion between the different sections of the country which lately shook the Union to its center, and which have been so happily compromised. The rejection by the Mexican Congress of the convention which had been concluded between that Republic and the United States for the protection of a transit way across the Isthmus of Tehuantepec and of the interests of those citizens of the United States who had become proprietors of the rights which Mexico had conferred on one of her own citizens in regard to that transit has thrown a serious obstacle in the way of the attainment of a very desirable national object. I am still willing to hope that the differences on the subject which exist, or may hereafter arise, between the Governments will be amicably adjusted. This subject, however, has already engaged the attention of the Senate of the United States, and requires no further comment in this communication.