e United States, it is necessary that he should show, in his pleading, that the suit he brings is within the jurisdiction of the court, and that he is entitled to sue there. And if he omits to do this, and should, by any oversight of the Circuit Court, obtain a judgment in his favor, the judgment would be reversed in the appellate court for want of jurisdiction in the court below. The jurisdiction would not be presumed, as in the case of a common-law English or State court, unless the contrary appeared. But the record, when it comes before the appellate court, must show, affirmatively, that the inferior court had authority, under the Constitution, to hear and determine the case. And if the plaintiff claims a right to sue in a Circuit Court of the United States, under that provision of the Constitution which gives jurisdiction in controversies between citizens of different States, he must distinctly aver in his pleading that they are citizens of different States; and he cannot maintain his suit without showing
