delivered the opinion of the Court:
It is to be noted that the trial in this case was had and the verdict and judgment rendered before the decision of this court in the case of Hendley v. Clark, in which, notwithstanding the practically uniform practice of twenty-five years, sanctioned by a decision of the Supreme Court of the District of Columbia, in general term, we were compelled to hold that there was no justification, either in law or logic, for the judicial nullification of Congressional enactment on the subject by the process of transferring causes from the courts of justices of the peace by means of the writ of certiorari, based solely upon the ground of concurrent jurisdiction, to the Supreme Court of the District for trial in the latter tribunal in thefirst instance. The question now raised, however, is whether in pursuance of the decision in the case of Hendley v. Clark, notwithstanding that the previous practice had been accepted in good faith, and notwithstanding that parties, including the appellant in the present case, resorted in good faith to the writ of certiorari for the removal of their causes from the courts of the justices of the peace, we are compelled to hold that the judgment rendered in this case, before the decision in Hendley v. Clark, and all the judgments rendered in similar cases under similar circumstances for twenty-five years, are null and void, as having *109been-rendered without jurisdiction. We do not think that an affirmative answer to this question is either required or justified by the decision in the case of Hendley v. Clark, or by anything that was said by this court in its opinion in that case.
It is the proper function of the judicially, as it is of the legislative power, and of all the branches of government, to deal with the present and the future, and not with the past. The errors of the past it is proper to correct for the guidance of future action, but accomplished facts must be taken as far as possible to have passed from the domain of judicial cognizance, so far as to preclude any revolutionary attempt at rectification. Courts, therefore, have always seduously guarded themselves, as far as possible, against retroactive effects in their decisions ; and they will not uproot judgments previously rendered, if there is any good ground upon which to sustain such judgments, notwithstanding that they may have been based upon a radically erroneous practice. The peace and good order of society and the security of titles demand that we pursue such course.
The present case, however, presents no substantial difficulty. It cannot be said that the Supreme Court of the District of Columbia was without jurisdiction of the class of cases to which this belongs. On the contrary, the statute expressly gives it concurrent jurisdiction with the courts of the justices of the peace in such cases. It had jurisdiction of the subject-matter; it acquired jurisdiction of the parties; the appellant here expressly invoked the exercise of that jurisdiction; and the appellee submitted to it without protest or objection of any kind. The proceedings in the court were entirely regular and according to the due course of the common law; and the judgment was one which it was fully competent and authorized by law to render; and we have no doubt that it was just. No element whatever of jurisdiction in the ordinary sense was wanting, and none is claimed to have been absent. The sole ground on which it is sought *110to nullify the proceedings, is that the justice of the peace had already acquired jurisdiction, and that it was not thereafter competent for the Supreme Court of the District to oust him from it and to assume the jurisdiction to itself.
But the answer to this contention is, that while it would have been entirely proper for the plaintiff in his original suit before the justice of the peace have insisted on his right to proceed in the forum of his selection, and for that purpose to have moved to quash the writ of certiorari, which motion the court should have allowed when made, yet it does not follow that, when the plaintiff submitted to the jurisdiction of the Supreme Court of the District, and abandoned his suit before the justice of the peace, and the justice of the peace himself relinquished his jurisdiction, upon which, under the circumstances, it would have been unseemly in him to insist, the proceedings thereafter in the Supreme Court of the District were all null and void. The disability of the Supreme Court of the District to proceed in such a case does not arise from any inherent defect of jurisdiction either as regards the subject-matter or the parties, but simply because the parties have taken their cause to another tribunal, equally competent under the law to deal with it. It could not reasonably be claimed that the parties, after invoking the exercise of this latter jurisdiction, might not of their own volition abandon it, and have recourse to the concurrent tribunal. And this is practically what happened; for in such matters we must look to the substance rather than the form. It is very true that it was not by the actual volition of both parties in the first instance that the suit was transferred to the Supreme Court of the District; but one of the parties, the one who now complains of the result of his own act, procured the transfer, and the other acquiesced in it. Both parties found themselves in a court of competent jurisdiction; it is true they were there under a process which we have adjudged to be irregular and improper; but they were there, and they agreed to proceed *111there to an adjudication of their controversy. And why was it not competent for them so to do ? Why could they not waive the irregularity or impropriety of the process under which they came into this tribunal? Why could they not discontinue their suit before the justice, and institute a suit for the same precise cause of action in the Supreme Court of the District? It will not be maintained for a moment that the plaintiff in the original suit might not have done this of his own volition without the concurrence and even against the will of the defendant. Why could he not do it with the concurrence and consent of the defendant,and at his invitation? And how does it matter that the invitation was conveyed in theform of animproper andirregular proceeding? The invitation was accepted and acted upon; the suit before the justice was abandoned; and what was to all legal intents and purposes a new suit was instituted in the Supreme Court of the District of Columbia. A formal dismissal of the suit before the justice was not required; for, under the practice then prevailing, both the justice and the parties to the proceeding all considered the suit in the justice’s court as at an end upon the issue and service of the writ of certiorari.
The fundamental vice in the appellant’s argument is in the failure to distinguish what is meant by jurisdiction in this connection. As w7e have said, there was no inherent want of jurisdiction in the Supreme Court of the District, either as regarded the parties or the subject-matter. The want of jurisdiction was as to the particular case, for the sole reason that another court, also competent, had already assumed jurisdiction therein. The obstacle to the assumption of jurisdiction by the Supreme Court of the District was an extraneous obstacle — extraneous both to the subject-matter and to the parties; but an obstacle which the parties themselves w7ere competent to remove, because it was one interposed by themselves and over which they retained control. Had the plaintiff in the cause insisted upon its retention, it would have been legally an insuperable obstacle to *112any attempt by the Supreme Court of the District to assume jurisdiction; but when he himself removed or agreed to the removal of the obstacle which he had created, it is not apparent why the concurrent tribunal, then fully armed with the required jurisdiction for all purposes, could not legally and properly proceed with .the cause.
This is undoubtedly a case where consent can give jurisdiction, since the only obstacle to the exercise of jurisdiction— an insuperable obstacle, it is true, while it lasts — is one that is removable at the pleasure of the plaintiff in the original suit. Consent, of course, can not give jurisdiction where the court is not authorized by law to deal with the subject-matter, or where there is some statutory provision forbidding the jurisdiction, or where the court has not power to pronounce the judgment rendered, or where it has no legal authority to proceed in the mode in which it has proceeded, or where something has arisen upon which by statutory law the jurisdiction is ousted. But it has never been heard that, where the obstacle is merely another suit pending in another court of equally competent jurisdiction, that obstacle may not be removed by the dismissal of the suit which creates it.
It is said, however, that this is not a suit instituted in the Supreme Court of the District, but the same suit that was instituted before the justice of the peace and wdiich wTas improperly and illegally removed from him into the Supreme Court of the District; and it is suggested that the suit is yet, in contemplation of law, pending before the justice, and that the proper course to be pursued now is to declare null and void all the proceedings subsequent to the removal, and to order the cause to be remanded to the justice for further proceedings by him therein. But the argument goes to the form rather than the substance of the matter. Cases cited in support of it do not sustain the position.
In the cases, for example, of Camp v. Wood, 10 Watts, 118, and Collins v. Woodruff, 9 Ark. 463, suits had been *113instituted in an inferior court which had no jurisdiction of the subject-matter; and when they were afterwards taken by appeal to a superior court, which had by law the original jurisdiction of them, it was held that the superior tribunal could not take cognizance of them upon the appeal. But an appeal, as we know, makes no new case; the proceedings on appeal are only a continuation of the original case. This is not a transfer from one court of competent jurisdiction to another court of competent jurisdiction, as is the case now under consideration.
Undue stress has been laid upon the statement in the opinion of this court in the case of Hendley v. Clark, to the effect that “ the justice of the peace having acquired jurisdiction of the case, his jurisdiction thereupon became exclusive.” We have no desire-to modify the decision in that case in any manner; on the contrary, we would emphatically reaffirm it. But by the phrase referred to, it was not meant, and it is no just inference from it, that, when a justice of the peace has once taken cognizance of a case of which his court by law has jurisdiction, no other court can thereafter acquire jurisdiction of the same controversy.
On the contrary, we know well that it is no unusual thing for parties to abandon their controversies in one jurisdiction, and to have recourse to another equally competent jurisdiction for their determination. That is a matter plainly within the control of the parties, and in most cases even within the control of one of the parties, the plaintiff— who, if there are several tribunals all equally competent to adjudicate his case, may elect the tribunal which he prefers, and yet may subsequently, with or without cause, abandon that tribunal and seek his remedy in another court. This is elementary law which requires no elaboration of argument. What we meant to say in the case of Hendley v. Clark was, that unless the plaintiff chose to abandon or discontinue his case before the justice of the peace, in whose court he had first instituted it, the juris*114diction of the justice of the peace became exclusive, and the Supreme Court of the District was not warranted by the law in arrogating to itself the jurisdiction of it. If, in the case of Hendley v. Clark, the Supreme Court of the District, notwithstanding the protest of the plaintiff and his objection to the jurisdiction, had proceeded to adjudicate the cause and render judgment therein, and, at the same time, at the instance of the plaintiff, the justice of the peace had proceeded with the cause and had rendered judgment therein, we would have been compelled, in accordance with our view of the law as stated in that case, to regard the proceedings in the court of the justice of the peace as the only valid proceedings, and those in the Supreme Court of the District as a nullity. In that sense, the jurisdiction of the justice of the peace in such cases is exclusive. But that does not mean that the plaintiff before the justice of the peace may not abandon his suit in the justice’s court, and may not institute his suit for the same cause of action in the Supreme Court of the District. And this we hold is precisely what was done in the case now before us.
It makes no difference that the action of the plaintiff in the premises was superinduced by a coercive and improper use of the writ of certiorari. He acquiesced in that use of the writ; he agreed to proceed in the Supreme Court of the District; he abandoned, according to the then-existing practice, his suit before the justice of the peace. Nor can it make any difference that no new pleadings were filed; for it was agreed between the parties by their course of action that the cause might proceed upon the pleadings made before the justice of the peace.
Whether in a case like the present the appellant should be permitted to take advantage of his own wrong, and to question at this stage the jurisdiction which he himself invoked, may well be questioned. Want of inherent jurisdiction, it is true, may always be shown by any party, and may be noticed even against the wishes of all the parties. *115But it would seem that the present case is one which would fall under the principle stated by the Supreme Court of the United States in the case of Bushnell v. Kennedy, 9 Wall. 387, in which a party, having procured the removal of a cause from a State court to the Federal court, was not permitted thereafter to question the jurisdiction of the latter tribunal. But this point it is not necessary to decide in the present case, since we hold that, after the acquiescence of the appellee in the removal of the cause to the Supreme Court of the District, and in pursuance of that acquiescence there was no want of jurisdiction in that court to proceed with the cause.
Being of this opinion, we must conclude that the order appealed from must be affirmed, with costs. And it is so ordered.