From the Pennsylvania Freeman. HAYTI.

The cupidity of our slaveholding democracy, fattened on Texas, is already active to accomplish the acquisition of Cuba. Having at last in their hands, the 'valley of rascals,' an empty world, they burn to make the most of their opportunities. Hayti, that great black republic, so long an eye-sore to the slaveholders, must be put out of the way; it is a dangerous neighbor to our southern States. It must be re-subjugated; the attempt of Napoleon must be re-tried, and the white man again put in possession of the island, standard or no standard, slave or no slave. Bold as this project may seem, it is nevertheless in train, and active efforts are making towards its accomplishment. Read the Ledger of this city,—that willing tool of unprincipled men in power,—read the late letters of its Washington correspondent. In his letter of Monday last, he says that Mr. Hogan of New York, who, it will be remembered, was sent out to Hayti on a secret expedition by Mr. Tyler, has lately returned to Washington, and has made a luminous report on the subject of the annexation of Hayti to the United States. The object of his mission, this writer says, 'was to examine into the capacities of the Dominicans or white population in the Spanish part of the island, to sustain their independence against the Haytians; and his report, taken in connection with the known circumstances of the island, leaves no doubt that Hayti can be easily subjugated, or rather, leaves no doubt of the success of the Dominicans against the Haytians, and that, too, for the purpose of acquiring for itself ultimate possession of the whole island. It is now asserted that the Dominican republic is independent, and is suing to the government of the United States to acknowledge her independence! Another Texan affair precisely; Hayti is 'to be annexed to this country in the same manner as was the 'valley of rascals.' Emissaries are sent out to stir up malcontents to insurrection; proffers of sympathy and ultimate co-operation, and perhaps more substantial aid are offered; Hayti is to be weakened by the insurgents; their independence is declared; an army is sent out to fix the boundary, and all the rest is done; and, presto, the independent country is annexed. This is the way our Texan republicans and progressive Democrats do things.

From all the information which Mr. Hogan has communicated to the cabinet, he expresses that he is firmly of the opinion that the Dominican government will maintain itself, and that, eventually, all the Haytians are aided by some one of the European governments. The proportion of whites, Mr. Hogan considers, is sufficient to maintain their ground, but the condition of the Haytians is such that they cannot long remain to contend single-handed with the Dominicans.

In this view of the case, as the subject is properly understood, every friend of humanity will feel a deep interest. It can hardly be doubted, that if the Dominican government shall be extended over the whole island, that slavery, or at least the most cruel serfdom, will undoubtedly revert to their descendants as former colored masters. From what we know of the flock of French refugees, when the time comes—and it is not far distant—making it necessary that they return to the island of their fathers, will find an early entry with them American feelings and principles; and that such a state of things, as this Domingo will, from these causes, utterly become essential to slaveholders.

In a commercial point of view, the success of the Dominicans will be of no small advantage or importance to the United States. With a government firmly established in the island by white men, the sympathies of the people will naturally be with us—and our commercial relations with Santo Domingo will be vastly increased. In a military and naval point of view, the possession of the island or independence by the United States is equally important.

Was there ever a bolder or more villainously conceived scheme of wholesale plunder? Surely God will be avenged on such a nation as this.