The Ball case, 163 U.S. supra, establishes that to try a man after a verdict of acquittal is to put him twice in jeopardy, although the verdict was not followed by judgment. That is practically the case under consideration, viewed in the most favorable aspect for the Government. The court of first instance, having jurisdiction to try the question of the guilt or innocence of the accused, found Kepner not guilty; to try him again upon the merits, even in an appellate court, is to put him a second time in jeopardy for the same offense, if Congress used the terms as construed by this court in passing upon their meaning. We have no doubt that Congress must be held to have intended to have used these words in the well settled sense as declared and settled by the decisions of this court.