But Africa, though the primary, is not the sole asylum within contemplation; an auxiliary one presents itself in the islands adjoining this continent, where the coloured population is already dominant, and where the wheel of revolution may from time to time produce the like result. Nor ought another contingent receptable for emancipated slaves to be altogether overlooked. It exists within the territory under the control of the United States, and is not too distant to be out of reach, whilst sufficiently distant to avoid, for an indefinite period, the collisions to be apprehended from the vicinity of people distinguished from each other by physical as well as other characteristics. The consent of the individuals is another pre-requisite in the plan of removal. At present there is a known repugnance in those already in a state of freedom to leave their native homes, and among the slaves there is an almost universal preference of their present condition to freedom in a distant and unknown land. But in both classes, particularly that of the slaves, the prejudices arise from a distrust of the favorable accounts coming to them through white channels. By degrees truth will find its way to them from sources in which they will confide, and their aversion to removal may be overcome as fast as the means of effectuating it shall accrue. The difficulty of replacing the labour withdrawn by a removal of the slaves, seems to be urged as of itself an insuperable objection to the attempt. The answer to it is--1, that notwithstanding the emigrations of the whites, there will be an annual and by degrees an increasing surplus of the remaining mass; 2, that there will be an attraction of whites from without, increasing with the demand, and, as the population elsewhere will be yielding a surplus to be attracted; 3, that as the culture of tobacco declines with the contraction of the space within which it is profitable and still more from the successful competition in the West, and as the farming system takes the place of planting, a portion of labour can be spared without impairing the requisite stock; 4, that although the process must be slow, be attended with much inconvenience, and be not even certain in its result, is it not preferable to a torpid acquiescence in a perpetuation of slavery, or an extinguishment of it by convulsions more disastrous in their character and consequences than slavery itself?