The objection appears to have arisen from confounding writs of error to a State court, with writs of error to a Circuit Court of the United States. Undoubtedly, upon a writ of error to a State court, unless the record shows a case that gives jurisdiction, the case must be dismissed for want of jurisdiction in _this court_. And if it is dismissed on that ground, we have no right to examine and decide upon any question presented by the bill of exceptions, or any other part of the record. But writs of error to a State court, and to a Circuit Court of the United States, are regulated by different laws, and stand upon entirely different principles. And in a writ of error to a Circuit Court of the United States, the whole record is before this court for examination and decision; and if the sum in controversy is large enough to give jurisdiction, it is not only the right, but it is the judicial duty of the court, to examine the whole case as presented by the record; and if it appears upon its face that any material error or errors have been committed by the court below, it is the duty of this court to reverse the judgment, and remand the case. And certainly an error in passing a judgment upon the merits in favor of either party, in a case which it was not authorized to try, and over which it had no jurisdiction, is as grave an error as a court can commit. The plea in abatement is not a plea to the jurisdiction of this court, but to the jurisdiction of the Circuit Court. And it appears by the record before us, that the Circuit Court committed an error, in deciding that it had jurisdiction, upon the facts in the case, admitted by the pleadings. It is the duty of the appellate tribunal to correct this error; but that could not be done by dismissing the case for want of jurisdiction here--for that would leave the erroneous judgment in full force, and the injured party without remedy. And the appellate court therefore exercises the power for which alone appellate courts are constituted, by reversing the judgment of the court below for this error. It exercises its proper and appropriate jurisdiction over the judgment and proceedings of the Circuit Court, as they appear upon the record brought up by the writ of error.