The plaintiffs and defendants were the respective owners of record of lots 133 and 132 on a map of property called Aetna Creen, in East Hartford. The map was filed in the town clerk’s office in the fall of 1915. The deeds in the respective chains of title of the parties refer to what, for the purposes of this appeal, is stipulated to be this map. It shows that the lots adjoin, that of the plaintiffs being next east of that of the defendants. Both lots front on the southerly side of a street designated on the map as Judson Place; it is now known as Brown Street. The map gives the frontage of each lot as 60.58 feet and the length of the side lines as 145 feet. The length of the rear lines is not given on the map but appears to be the same as the front lines. While the side lines of each lot are equal in length and parallel, *691 the northwest corner of each is less than a right angle. A fence runs from the point marking the southeasterly corner of lot 132 and the southwesterly corner of lot 133, northerly, in substantially a straight line, to its intersection with the southerly side of Brown Street at a point 5.34 feet easterly of the northwest corner of the plaintiffs’ lot 133 as shown on the map. In other words, the fence constitutes the easterly side line of a triangular area having a base of 5.34 feet. This base is coincidental with the westerly portion of the front line of lot 133, and the westerly side line of the triangular area is coincidental with the westerly line of lot 133, as shown on the map.
The plaintiffs purchased their property from Mary Szydlowska by warranty deed dated October 18, 1956. In the deed, the plaintiffs’ lot is described as located on the southerly side of Brown Street and as being lot 133 on the Aetna Green map. It is further described as being the property conveyed to Mary Szydlowska by Irving 0. and Emma A. Schneider by warranty deed dated May 23, 1953, and recorded in a designated volume and page of the land records. The Schneider deed contains substantially the same description as the Szydlowska deed, referring to the property embraced in the deed as lot 133 on the Aetna Green map. In this action, the plaintiffs allege title in themselves to all of lot 133, the maintenance by the defendants of the fence thereon, and the defendants’ claim of an interest in, or title to, the land west of the fence. The relief sought is a judgment determining the rights of the parties in the triangular strip, damages, and any other appropriate equitable relief. The defendants, in a special defense, claimed title to the triangular strip by adverse possession. The remainder of their *692 answer amounted to a general denial of the allegations of the complaint except the allegation concerning the source of their title to lot 132, which they admitted.
This was a statutory action to clear title, instituted under the provisions of what are now §§ 47-31 and 47-32 of the General Statutes. The complaint generally followed that in Practice Book, Form No. 397, except for the added claims for damages and appropriate equitable relief, incidental to the basic claim involved in the statutory action, an action which is equitable in its essence.
Foote
v.
Brown,
Section 47-31 provides that the action may be brought by anyone claiming title to, or any interest in, the property, and that the complaint must set forth this title or interest and the manner in which the plaintiff acquired it.
Gaul
v.
Baker,
The defendants claimed that the plaintiffs’ grantor was ousted of possession of the triangular strip at the time of the delivery by her of the warranty deed to the plaintiffs in 1956, and that consequently that deed was, as to that strip, void under the provisions of § 47-21 of the General Statutes,
1
and therefore inoperative to convey to the plaintiffs any interest whatsoever in the strip. The defendants attack the
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conclusion of the court that the plaintiffs had record title to lot 133 as inadequate to support a judgment in their favor, since that conclusion does not constitute a finding of a sufficient interest by the plaintiffs in the disputed strip to permit them to maintain this action to clear title to the strip. This claim is sound. “A mere paper chain of title does not establish ownership in one unless his possession or that of his predecessors in title is shown, though title satisfactorily established may draw with it possession in the absence of any evidence to the contrary.
Foote
v.
Brown,
The defendants claim that no ultimate finding of actual title in the plaintiffs could be made on the subordinate facts as found in this case. The possession necessary to constitute an ouster under § 47-21 is not some fleeting or ephemeral technical invasion of the property nor the occasional technical invasion tolerated by adjoining neighbors on good terms with one another. Rather, it is possession of a character such that it would, if continued for the requisite period, ripen into a title by adverse possession.
Robinson
v.
Meyer,
supra. And where, as here, the ouster is not claimed to have affected other than a definite portion of the property purportedly conveyed by the deed, the statutory invalidity in the deed is restricted in its effect to that portion.
Milardo
v.
Branciforte,
The court found as a fact that the fence had been in its present position for more than fifteen years. The plaintiffs’ deed of acquisition was in 1956. As far as is disclosed by the finding, the defendants were in possession of the triangular strip at the time of the conveyance to the plaintiffs, and the effective boundary between the lots was then, and for a long time previously continuously had been, the fence instead of the westerly line of lot 133 as shown on the map. Under these circumstances, there is nothing in the finding to explain how, in view of the existence, location and character of the fence, and the length of time it had remained in place, the court could conclude, as it must in order to render any judgment in favor of the plaintiffs, that they sustained their burden of proving an interest in the triangular strip sufficient to maintain this action to clear title as to it.
Milardo
v.
Branciforte,
supra. If the deed of the plaintiffs was in fact void as to this triangular strip, by reason of the statute, then they had no interest in the strip at all and judgment as matter of law must be rendered against them.
Borden
v.
Westport,
Another claim of law on the part of the defendants is that it was incumbent on the plaintiffs to prove the
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source of their title to the disputed land by a longer chain of title than the Schneider and Szydlowska warranty deeds, which did not go back of 1953. As previously pointed out, a plaintiff has the burden of proving, within the purview of the allegations of his complaint, an interest in the property in dispute sufficient to justify his maintenance of the action. The plaintiffs here, by their complaint, claimed title by deed to the area in question. They were therefore required to produce their deed of acquisition or show its loss, and to prove, by at least one of the subscribing witnesses, unless both witnesses were shown to be unavailable, the due execution of the deed.
Kelsey
v.
Hanmer,
As the defendants point out, one cannot create a title in himself merely by proof of a set of deeds purporting to constitute a chain of title ending with a conveyance to himself.
Foote
v.
Brown,
The defendants further claim that the court had to find that they had proved title in themselves to the triangular strip by adverse possession. Here, it must not be overlooked that we are no longer concerned with the plaintiffs’ burden of proving a sufficient interest in the triangular strip to permit them to maintain the action, but with the burden of the defendants to prove the facts necessary for an affirmative adjudication of title in themselves. Section 47-31 of the General Statutes provides that in an action such as this “[e]ach defendant shall, in his answer, state whether or not he claims any estate or interest in, or encumbrance on,
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such property, or any part thereof, and, if so, the nature and extent of the estate, interest or encumbrance which he claims, and he shall set out the manner in which such estate, interest or encumbrance is claimed to be derived.” Under this statute, if a defendant claims no interest in the premises affected, he ordinarily must so state in his answer, and if he claims any interest he ordinarily must describe it, and the manner in which he acquired it, in his answer.
Miles
v.
Strong,
As to the issue whether title to the triangular strip was in the defendants by adverse possession, they had the burden of proof.
Dawson
v.
Orange,
supra;
Bridgeport Hydraulic Co.
v.
Sciortino,
supra. We cannot say as matter of law that the court was required to find that this issue was affirmatively proven. The mere fact that the fence had been in place for over fifteen years would not, in and of itself, as matter of law, require a finding of acquisition of title by adverse possession. See cases such as
Bridgeport Hydraulic Co.
v.
Sciortino,
supra;
Palmieri
v.
Bulkley,
The other claims of error do not require discussion in view of our disposition of the ease.
There is error, the judgment is set aside and a new trial is ordered.
In this opinion the other judges concurred.
Notes
“Sec. 47-21. DEEDS 03? LAND BY PERSONS OUSTED OP POSSESSION, void. Any conveyance or lease, for any term, of any building, land or tenement, of which the grantor or lessor is ousted by the entry and possession of another, unless made to the person in actual possession, shall be void.”
It perhaps should be noted that in the few eases where the complaint correctly alleges the plaintiff’s ownership and also the defendant’s claim, based on admitted facts showing the nature, extent and derivation of his title or other interest, the defendant may, in his answer, simply admit the allegations of the complaint, since he thereby puts in issue the questions of law determinative of the conflicting claims of title. See cases such as
Hartford-Connecticut Trust Co.
v.
Cambell,
