The decision on the demurrer was in favor of the plaintiff; and as the plaintiff prosecutes this writ of error, he does not complain of the decision on the demurrer. The defendant might have complained of this decision, as against him, and have prosecuted a writ of error, to reverse it. But as the case, under the instruction of the court to the jury, was decided in his favor, of course he had no ground of complaint. But it is said, if the court, on looking at the record, shall clearly perceive that the Circuit Court had no jurisdiction, it is a ground for the dismissal of the case. This may be characterized as rather a sharp practice, and one which seldom, if ever, occurs. No case was cited in the argument as authority, and not a single case precisely in point is recollected in our reports. The pleadings do not show a want of jurisdiction. This want of jurisdiction can only be ascertained by a judgment on the demurrer to the special plea. No such case, it is believed, can be cited. But if this rule of practice is to be applied in this case, and the plaintiff in error is required to answer and maintain as well the points ruled in his favor, as to show the error of those ruled against him, he has more than an ordinary duty to perform. Under such circumstances, the want of jurisdiction in the Circuit Court must be so clear as not to admit of doubt. Now, the plea which raises the question of jurisdiction, in my judgment, is radically defective. The gravamen of the plea is this: "That the plaintiff is a negro of African descent, his ancestors being of pure African blood, and were brought into this country, and sold as negro slaves." There is no averment in this plea which shows or conduces to show an inability in the plaintiff to sue in the Circuit Court. It does not allege that the plaintiff had his domicil in any other State, nor that he is not a free man in Missouri. He is averred to have had a negro ancestry, but this does not show that he is not a citizen of Missouri, within the meaning of the act of Congress authorizing him to sue in the Circuit Court. It has never been held necessary, to constitute a citizen within the act, that he should have the qualifications of an elector. Females and minors may sue in the Federal courts, and so may any individual who has a permanent domicil in the State under whose laws his rights are protected, and to which he owes allegiance. Being born under our Constitution and laws, no naturalization is required, as one of foreign birth, to make him a citizen. The most general and appropriate definition of the term citizen is "a freeman." Being a freeman, and having his domicil in a State different from that of the defendant, he is a citizen within the act of Congress, and the courts of the Union are open to him.