delivered the opinion of the court.

The motion to dismiss the appeal must be sustained. Upon the entire testimony finally presented to the Circuit Court, and transmittéd in tfie record original and supplemental to this court, the proof is overwhelming that the value of the property did not exceed five thousand dollars; and this positive testimony is reinforced by all that appears in the case in respect to its situation and condition. There is little room for doubt on this matter,'notwithstanding the opinion of appellant that the property is worth over five thousand dollars. It is not in the power of the Circuit Court to determine the extent and limits of our jurisdiction, for that is a matter which this court must finally decide for itself. The practice which is to be pursued anfi,.the rules which are to control have been clearly, and fully stated by the Chief Justice, in the recent case of Red River Cattle Compamy v. Needham, 137 U. S. 632, in which this court, while deciding that where the valuéis hot definitely_determined hy. the pleadings or decree it should generally be. settled in the first instance by,the Circuit Court iipon notice and testi *559 mony, and not upon additional testimony here, also held that the showing made in that ease in the Circuit Court by affidavits was not sufficient to establish a value in excess of five thousand dollars, and therefore dismissed the writ of error. In this case, by a like, showing, the value clearly did not exceed five thousand dollars; and therefore we have no jurisdiction. This is not- like the case of Gage v. Pumpelly, 108 U. S. 164, where the affidavits left the matter doubtful, and therefore we declined to dismiss the appeal which had been allowed by the Circuit Court.

Nor is it sufficient answer to this, that the Circuit Court had no power to set aside the order allowing an appeal after the appeal had been perfected and the record filed here, Keyser v. Farr, 105 U. S. 265; for under the circumstances it is no more than right that we should consider .these subsequent affidavits. The appellant was present at the hearing of this motion. It does not appear that he raised any question as to the power of the court to entertain it, and he was given leave to file additional affidavits if he desired. All these matters, including the affidavits, are presented to this court by a supplemental record brought up by stipulation of parties. While the order setting áside the allowance of an appeal may have been ineffectual, because the case had passed out of that into this court, yet these affidavits of value, one by the plaintiff and sixteen by the witnesses of the defendant, were all filed in that court, filed for the purpose of determining the right to an appeal, and have all come regularly before us and are presented for our consideration. Although in a doubtful case we shall not disturb the ruling of a Circuit Court granting or vacating an appeal, yet when we are fully satisfied that the amount in controversy is not sufficient to give us jurisdiction, we ought not to attempt an inquiry into the merits of the case which is sought to be appealed. Unless we exercise a supervising power over these matters, many cases might be thrust upon our co..: sideration through the inattention of the trial court, or the mistake or wrong of the defeated party, which are not, in fact, within our jurisdiction. Upon the testimony which is called to our attention by the action/of'the Circuit Court and the certifi *560 cate of the circuit clerk in such manner that we cannot shut our-eyes to it, it is obvious that the amount in controversy is not sufficient to give us jurisdiction. Under the circumstances it would be sacrificing substance to form, and assuming a jurisdiction which we do not have, to hold that because this testimony did not get before the trial court in time for its primary action it must be wholly ignored by us. It reaches us before-we are called upon to act, and comes to us from that court. ¥e hold that, under all the showing that is presented, the-amount in controversy is not sufficient to give us jurisdiction, and, therefore, the appeal must be and is

Dismissed..