_A._ In the old slave States, where the process of amalgamation has been going on for a long time, this is remarkably the case. An old soldier, who lately visited the South, said he was not so much struck by any circumstance, as by the great change that had taken place in the complexion of the slaves since the Revolution. Now and then I have seen in the southern papers advertisements for a runaway slave, “who passes himself for a white man.” A Boston gentleman, who dislikes the abolitionists very much, visited Georgia a few years ago. He told me that when he was walking with a planter one day, they met a man driving a team, who had a perfectly fair complexion, with blue eyes and brown hair. The Bostonian remarked, “That must be an independent fellow, to be driving a team in this part of the country, where it is considered so disgraceful for a white man to work.” “O, that fellow is a slave,” replied the Georgian. Almost every body has heard of the recent case of Mary Gilmore, of Philadelphia, a perfectly white girl, of Irish parentage, who was taken up and tried as a runaway slave. A Missouri newspaper proves that a white man may, without a _mistake_, be adjudged a slave. “A case of a slave sueing for his freedom, was tried a few days since in Lincoln county, of which the following is a brief statement of particulars: A youth of about ten years of age sued for his freedom on the ground that he was a free white person. The court granted his petition to sue as a pauper upon inspection of his person. Upon his trial before the jury, he was examined by the jury and two learned physicians, all of whom concurred in the opinion that very little, if any, race of negro blood could be discovered by any of the external appearances. All the physiological marks of distinction, which characterize the African descent, had disappeared. His skin was fair, his hair soft, straight, fine and white, his eyes blue, but rather disposed to the hazel-nut color; nose prominent, the lips small, his head round and well formed, forehead high and prominent, ears large, the tibia of the leg straight, and feet hollow. Notwithstanding these evidences of his claims, he was proved to be the descendant of a mulatto woman, and that his progenitors on the mother’s side had been and still were slaves: _consequently he was found to be a slave_.” I have been told of a young physician, who went into the far Southern States to settle, and there became in love with a very handsome and modest girl, who lived at service. He married her; and about a year after that event, a gentleman called at the house, and announced himself as Mr. J*******y, of Mobile. He said to Dr. W*****, “Sir, I have a trifling affair of business to settle with you. You have married a slave of mine.” The young physician resented this language; for he had not entertained the slightest suspicion that the girl had any other than white ancestors since the flood. But Mr. J. furnished proofs of his claim, and Dr. W.