We publish elsewhere to-day a most interesting communication by a gentleman who resided in Barbadoes before and after the abolition of slavery there by the English government, and whose experience and acquaintance with the institution enables him to speak "by authority." One fact is worth a good many theories, and the facts to which our correspondent bears evidence ought to put to flight at once every doubt cherished in Northern minds concerning the perfect feasibility and political economy of emancipation. In Barbadoes, and we believe the West. Indies generally, the proportion of whites to Negroes is and was far less than in this country, and consequently the danger, if any there were, of insurrections and anarchy, was greater. But in spite of all this, by a judicious plan of preparation, the change from slavery to freedom was made without the least public disturbance, and was followed by the most gratifying pecuniary results to the planters and the British government. And to intimate that American statesmanship is inadequate to grapple with such a question and successfully carry it out, either in a time of war of peace, is a slander as base as its object is perfidious and unpatriotic.
The letter is a clear and calm statement of facts which came under the writer's eye, and we commend it to the attention of every reader who would be posted on the great question of the age.