But the great teacher in this school of feeling is sickness. In this school we have witnessed scenes at which even the hard heart of a thorough bred philanthropist would melt. But here, we shall be told, it is not humanity, but interest that prompts. Be it so. Our business is not with the cause but the effect. But is it interest, which, with assiduous care, prolongs the life of the aged and decrepid negro, who has been, for years, a burthen? Is it interest which labors to rear the crippled or deformed urchin, who can never be any thing but a burthen—which carefully feeds the feeble lamp of life that, without any appearance of neglect, might be permitted to expire? Is not the feeling more akin to that parental στοργη, which, in defiance of reason, is most careful of the life which is, all the time, felt to be a curse to the possessor. Are such cases rare? They are as rare as the occasions; but let the occasion occur, and you will see the case. How else is the longevity of the negro proverbial? A negro who does no work for thirty years! (and we know such examples) is it interest which has lengthened out his existence?

Let the philanthropist think as he may—by the negro himself, his master's care of him in sickness is not imputed to interested feelings. We know an instance of a negress who was invited by a benevolent lady in Philadelphia to leave her mistress. The lady promised to secrete her for a while, and then to pay her good wages. The poor creature felt the temptation and was about to yield. "You are mighty good, madam," said she "and I am a thousand times obliged to you. And if I am sick, or any thing, I am sure you will take care of me, and nurse me, like my good mistress used to do, and bring me something warm and good to comfort me, and tie up my head and fix my pillow." She spoke in the simplicity of her heart, and the tempter had not the heart to deceive her. "No," said she "all that will come out of your wages—for you will have money enough to hire a nurse." The tears had already swelled into the warm hearted creature's eyes, at her own recital of her mistress's kindness. They now gushed forth in a flood, and running to her lady who was a lodger in the house, she threw herself on her knees, confessed her fault, was pardoned, and was happy.

But it is not by the bedside of the sick negro that the feeling we speak of is chiefly engendered. They who would view it in its causes and effects must see him by the sick bed of his master—must see her by the sick bed of her mistress. We have seen these things. We have seen the dying infant in the lap of its nurse, and have stood with the same nurse by the bed side of her own dying child. Did mighty nature assert her empire, and wring from the mother's heart more and bitterer tears than she had shed over her foster babe? None that the eye of man could distinguish. And he who sees the heart—did he see dissimulation giving energy to the choking sobs that seemed to be rendered more vehement by her attempts to repress them? Philanthropy may think so if it pleases.

A good lady was on her death bed. Her illness was long and protracted, but hopeless from the first. A servant, (by no means a favorite with her, being high tempered and ungovernable) was advanced in pregnancy, and in bad health. Yet she could not be kept out of the house. She was permitted to stay about her mistress during the day, but sent to bed at an early hour every night. Her reluctance to obey was obvious, and her master found that she evaded his order, whenever she could escape his eye. He once found her in the house late at night, and kindly reproving her, sent her home. An hour after, suddenly going out of the sick room, he stumbled over her in the dark. She was crouched down at the door, listening for the groans of the sufferer. She was again ordered home, and turned to go. Suddenly she stopped, and bursting into tears, said, "Master it aint no use for me to go to bed, Sir. It don't do me no good, I cannot sleep, Sir."

Such instances prove that in reasoning concerning the moral effect of slavery, he who regards man as a unit, the same under all circumstances, leaves out of view an important consideration. The fact that he is not so, is manifest to every body—but the application of the fact to this controversy is not made. The author of "The South Vindicated" quotes at page 228, a passage from Lamartine, on this very point, though he only uses it to show the absurdity of any attempt at amalgamation. The passage is so apt to our purpose that we beg leave to insert it.

The more I have travelled, the more I am convinced that the races of men form the great secret of history and manners. Man is not so capable of education as philosophers imagine. The influence of governments and laws has less power, radically, than is supposed, over the manners and instincts of any people, while the primitive constitution and the blood of the race have always their influence, and manifest themselves, thousands of years afterwards, in the physical formations and moral habits of a particular family or tribe. Human nature flows in rivers and streams into the vast ocean of humanity; but its waters mingle but slowly, sometimes never; and it emerges again, like the Rhone from the Lake of Geneva, with its own taste and color. Here is indeed an abyss of thought and meditation, and at the same time a grand secret for legislators. As long as they keep the spirit of the race in view they succeed; but they fail when they strive against this natural predisposition: nature is stronger than they are. This sentiment is not that of the philosophers of the present time, but it is evident to the traveller; and there is more philosophy to be found in a caravan journey of a hundred leagues, than in ten years' reading and meditation.

There is much truth here, though certainly not what passes for truth with those who study human nature wholly in the closet, and in reforming the world address themselves exclusively to the faults of others, and the evils of which they know the least, and which least concern themselves.

We hope the day has gone by when we are to be judged by the testimony of false, interested, and malignant accusers alone. We repeat that we are thankful to Mr. Paulding for having stepped forward in our defence. Our assailants arc numerous, and it is indispensable that we should meet the assault with vigor and activity. Nothing is wanting but manly discussion to convince our own people at least, that in continuing to command the services of their slaves, they violate no law divine or human, and that in the faithful discharge of their reciprocal obligations lies their true duty. Let these be performed, and we believe (with our esteemed correspondent Professor Dew) that society in the South will derive much more of good than of evil from this much abused and partially-considered institution.