IT will be recollected, that I, in the first edition of my "Appeal,"*promised to demonstrate in the course of which, viz. in the course of my Appeal, to the satisfaction of the most incredulous mind, that we Coloured People of these United States, are, the most wretched, degraded and abject set of beings that over lived since the world began, down to the present day, and, that, the white Christians of America, who hold us in slavery, (or, more properly speaking, pretenders to Christianity, ) treat us more cruel and barbarous than any Heathen nation did any people whom it had subjected, or...