The Rev. Stephen Kay, Corresponding member of the South African Institution &c., gives a most heart rending account of the horrid barbarities of war; of the great extent and atrocities of slavery; of the extreme degradation and hardships of females, who are always regarded and treated as slaves, and no longer valued when they become useless; of modes of torture and killing too shocking to be narrated; all of which, and many other atrocities of African barbarism, are the common scenes of those regions of Africa which he visited. Major Laing is to the same point, and various other travellers that have found motives to visit Africa, or to penetrate into its interior. There is no diversity of testimony on the subject, but one common voice going out upon the world, through a variety of channels, running back for ages, and from numerous and remote sections of that dark and cruel Continent, all certifying to their extreme barbarism and brutal degredation, with scarcely a gleam of intellectual light, or social comfort, beaming out from their history. Do not the readers of Mungo Park recollect the story of poor Nealee? Does not the world know the fate of Park himself, and of Lander? And are not the testimonies abundant to the barbarous treachery and atrocious cruelty of the race, independent of the effects of that European traffic in human flesh and blood, which began, between two and three hundred years ago, to draw off a fraction of this immense amount of human misery, which could scarcely be increased by the agonies and suffocations of “THE MIDDLE PASSAGE”? It was, indeed, this very state of things which presented temptations and opened the door to that traffic, which transplanted a portion of the African race to the Islands and Continent of this Western hemisphere. It is to the Africans themselves, that this trade owes its origin--to their barbarism, to their everlasting trade in war, and the glutting of their own marts with the blood and sinews of their own flesh all to the sore evil of this Continent, and to the inexpiable scandal of Christian Europe, that the flood gates of African barbarism were let out upon these Western Isles and shores, to gratify the lust of gain in those monsters who carried on and profited by the traffic, and to entail a long protracted curse on the less guilty, though not innocent, tenants of this new world. The continuance of this traffic, and the inhuman over-working of this race in the South American and West Indian Colonies appertaining to the Governments of Europe, are too notorious to require recitation. We are more concerned to notice the history and character of that slavery which is to be found in our own Republic, as the result of that trade which disgraced Christendom, and imposed on the Nations that tolerated and patronized it a fearful responsibility.