The plaintiff brought his action against the defendant for a specific performance of a certain written contract in which the defendant agreed to convey to plaintiff certain real estate for the sum of $22,400, in consideration for which the defendant, among other things, agreed to accept a certain promissory note, payable to the plaintiff and signed by the interveners, Walter T. Fitzgerald, Margaret Fitzgerald, Lizzie Kerlin, and Cíate Kerlin. The defendant, among other things, alleged, as a defense to plaintiff’s right to a specific performance, that she relied upon the fact that the note aforesaid, which by her contract she agreed to accept as part consideration for her conveyance, was a valid obligation and enforceable against the makers of the note; that she was, subsequently, informed that the note, so to be delivered to her, was tainted with usury, and was therefore not enforceable against the makers of the note, and would be subject to such *467defenses in her hands if she took it, that the note was not what it purported to be on its face, and that she was deceived into signing the contract and entering into the agreement to convey ; and alleged that, by reason of the fact aforesaid, and other facts alleged, she was not, in equity, bound to a performance of said contract; that plaintiff was therefore not entitled to the specific performance of it, and asked that plaintiff’s petition be dismissed. Thereupon these interveners filed their petition of intervention, in which they allege that the promissory note, referred to in defendant’s answer, made by them, and which the plaintiff is seeking in the action to compel the defendant to take in part payment for her land, was given entirely for usurious interest, and that interveners are therefore interested in the controversy in so far as said note is involved, and that they have an interest in preventing the passing of said note, tainted with usury, into the hands of the defendant; that, if this were permitted, they might be deprived of their defense to said note, and they ask that they be permitted to present their defense to said note, that justice may be administered between interveners and the plaintiff, and they pray that an accounting be had between the interveners and the plaintiff, and that said note be decreed null and void, and that the same be fully discharged.
To this petition of interveners plaintiff demurred. Thereupon the cause proceeded to trial upon the issues tendered between the plaintiff, the defendant, and the interveners. After the evidence had proceeded at some length, a motion to dismiss petition of intervention was made, which, among other things, stated: “The claims of the interveners, as set forth in their petition, are not germane to the issues in this case between the plaintiff and the defendant, in that they have failed to show that they have any right that will be prejudiced by any adjudication between the plaintiff and the defendant; that they are attempting to inject new matters in the main suit, and extend the scope of litigation beyond the controversy between the plaintiff and the defendant.” Thereupon *468the court made the following ruling: “And now on this 3d day of April, 1913, the trial of this case being in progress and the witnesses Walter T. Fitzgerald and date Kerlin having been examined on behalf of the defendant and said interveners, plaintiff presents his demurrer to the petition of interveners, for a ruling thereon, and said demurrer, having-been duly considered by the court, is overruled, to which ruling at the time plaintiff duly excepts. Thereupon, plaintiff presents for the consideration of the court his motion to dismiss the petition of intervention, which motion was filed this day; the court upon due consideration thereof, sustains said motion and dismisses said petition of intervention, and taxes the costs, made by said intervention, to the interveners. It is therefore ordered and adjudged that the petition of interveners be, and it is hereby, dismissed, at the costs of interveners, taxed at $19.40, for which sum of $19.40 it is ordered, adjudged, and decreed plaintiff have and recover judgment against the interveners, Cíate Kerlin, Lizzie Kerlin, and Walter T. Fitzgerald; to each of which orders and to said judgment said interveners at the time duly except.” After this ruling dismissing interveners’ petition, the cause proceeded to trial upon the issues between the plaintiff and the defendant, and thereafter the court entered a decree in favor of the defendant dismissing plaintiff’s petition, and the controversy between plaintiff and defendant was at an end. From the order dismissing interveners’ petition, interveners have appealed to this court.
The plaintiffs claim the right to intervene under section 3594 of the Code of 1897, which reads as follows: “Any person who has an interest in the matter in litigation, in the success of either of the parties to the action, or against both, may become a party to an action between other persons, either by joining the plaintiff in claiming what is sought by the petition, or by uniting with the defendant in resisting the claim of the plaintiff, or by demanding anything adversely, to both the *469plaintiff and defendant, either before or after issue has been joined in the cause, and before the trial commences.”
In this case, the plaintiff sought a specific performance of a written contract made between him and the defendant. He sought, by the action, to compel the defendant to convey to him certain lands, and to take from him in payment therefor, as provided in the contract, a note executed by these interveners. The defendant denied his right to a specific performance, and based this denial, among other things, upon the fact, as alleged by her, that the note executed by these interveners, and which the plaintiff sought to compel her to take, was tainted with usury, and therefore the court ought not to decree a specific performance of the contract. As between the .plaintiff and the defendant, so far as this issue is concerned, the only question for the court to determine is whether or not a decree of specific performance ought to be entered against the defendant. Upon this issue tendered, the plaintiff’s right to a decree depended upon whether or not the note in question was tainted with usury, and whether or not the plaintiff fraudulently concealed this fact from the defendant to induce her to enter into the contract; If the fact were found, as alleged by the defendant, the court undoubtedly would refuse, as it did refuse, a specific performance of the contract.
A petition of intervention, under this statute, to be permissible, the intervener in the petition must join the plaintiff in claiming what is sought by him in his petition, or must show a right to unite, an interest in uniting, and must unite with the defendant in resisting plaintiff’s claim.
In the case at bar, interveners did not unite with the plaintiff in asking any relief against the defendant, nor did they join with the defendant; nor did they have an interest in joining with the defendant in resisting plaintiff’s claim for a specific performance, nor did they demand anything adversely to both the plaintiff and the defendant. They presented, and sought to enforce, an independent right on the part of these interveners, against the plaintiff — a right to pro*470tect which it was not necessary for them to join in this suit or secure the relief for which they prayed.
Before this petition of intervention was filed, the defendant was advised of the usurious character of the note and made her defense on that ground. The intervention added nothing to her defense. Nor did the dismissal of the petition take away from these interveners, or adjudicate any right which they sought to have investigated in this ease. They were clearly interlopers in a proceeding and suit in which the success or failure of either party would in no way affect their rights, and they did not ask relief or demand anything adversely to both of these parties litigant. As said in Des Moines Ins. Co. v. Lent, 75 Iowa, 522, 525: “One who attempts to intervene in an action pending between other parties, without bringing himself within the provisions of the statute, is a mere interloper, who acquires no rights by his unauthorized interference. ’ ’
In the case at bar, the success of the plaintiff would not have defeated any right that the'interveners had, or attempted to assert, in this suit. The success or failure of the defendant in that suit would not affect any right they had or attempted to assert. The relief they sought was independent of any controversy between these parties, and independent of any relief which could possibly be granted to either of the parties in the suit as originally brought. But, however this may be, the cause between the plaintiff and the defendant is terminated by a judgment of the court in favor of the defendant, dismissing plaintiff’s petition.
There is no action pending now between these parties, and a reversal of this cause would not add to interveners ’ right to proceed against the holder of this note for a cancellation, on the grounds averred in their petition of intervention.
. The issue, sought to be tendered by the petition of intervention, was not fully tried and disposed of on its merits in the court below. The case was disposed of there on purely technical grounds. No decree upon the merits of the eon*471troversy was entered in the district court. It is not triable de novo here for that reason. The most that could be done, if we found error in the ruling of the court, would be to reverse the cause and send it back for trial upon its merits. We do not think any good purpose would be served by this, even if we found error in the court’s action. We find no rever.sible error, and the cause is — Affirmed.
Ladd, C. J., and Deemer and Withrow, JJ., concur.