delivered the opinion of the court.

This is a suit instituted to recover certain.slaves as described in the petition of the plaintiffs. They obtained á verdict and judgment in the District Court, from which the defendant appealed.

The action is petitory, and in order to recover, the plaintiffs must show title in themselves against the general denial in the answer of the defendant, who also pleads title to the property in dispute.

The evidence of title in the plaintiffs, is proof of heirship to Isaac Phillips, their father, who was husband to one of the persons, and father of the other two, from whom the defendant derives title, and an act purporting to be a partition of the succession of their ancestor, made in the state of Alabama. This act is under private signature, but it is alleged to have been afterwards acknowledged before a notary public. The act by which this partition purports to be evidenced, was objected to on the ground of not being supported by proper certificates as a record of another state under the act of Congress, and as not being properly proven as an original. It was, however, admitted by the judge a quo, and a bill of exceptions taken, which must be examined before we enter into an investigation of the titles set up by the contending parties. The certificates which are annexed to the pretended deed of partition, if it- be considered as an exemplification of office books, do *149not authorise its admission as evidence. It is not solemnized by a notarial seal, and the certificate of the governor of the state of Alabama, that the person who assumes the character of notary, was really such, is not authenticated by the great seal of that state.

If the instrument now offered be viewed as an original, i , . T the proof offered is msufhcient to support its authenticity. It is true, that in cases of protest of hills of exchange the act of a notary, in a foreign state, is received without inquiry into , . J’ . ’ , , •h , his capacity as such. These acts are, however, admitted without fuithei inquiry only in aid of commerce, and their authenticity rests solely on commercial law; and may be , , : . , ^ „ considered as an exception to the general rale that the acts of a person assuming power as an officer of a foreign state, when contested in a court of justice, can have no weight until his J ° capacity he proven.

In the present case there is no evidence that the person before whom the partition purports to have been acknowledged, was a notary public at the time of such acknowledgment, because the certificate of the governor of Alabama to that effect is not supported by the great seal; therefore the judge in the court below erred in admitting this act of partition.

Having thus disposed of this part of the plaintiffs’ evidence, we proceed to examine the titles of the parties, and what remains of the title of the plaintiffs is based solely on rights as co-heirs with the persons under whom the defendant claims.

Being plaintiffs in a petitory action, they must pevail by the strength of their own title, and not by the weakness of their adversary. It is perhaps true, that a co-partner would have a right to recover property remaining in co-parcenary, from a person having no title, but could only proceed by way . . i . • i i • t of partition against his co-proprietors, or those claiming under mem.

The defendant claims title by virtue of a sheriff's sale, made ** under a seizure of a part of the property belonging to the succession of Isaac Phillips, which was opened by his death, *150the parish of Rapides, and which remained undivided in ^ posgeggjon 0f pjg widow, and two of the heirs, John and Abraham Phillips, until a partition was provoked by a judgnrent creditor of the heirs. The present plaintiff appeared in that suit for partition: took no appeal front the decision of the judge of the Court of Probates; and as to them, it is now final. The judgment allotted to the heirs, John and Andrew Phillips, amongst others, the slaves now in dispute, by charging them with the price for which they had been sold, to pay their debts; and particularly a debt to H. A. Bullard, secured by mortgage, executed by them on the said slaves, to satisfy which, they were sold. Objections are made to the validity of the title, • , i , , , , , acquired by the purchaser at sheriffs sale, on the ground that an undivided part or share of a co-heir in succession, could be siezed on execution. This is true according to the Civil Code, article 6, page 490, which was enforced at the time of the seizure under Bullard’s execution: Yet the sheriff proceeded to sell without opposition, and conveyed to the defendant.

If that sale involves any nullity, it is merely relative, and cou^ set aside only by a person who has just title, in an action of rescission ; and in whom the title remained, at the time of instituting such action. In the present case the petition contains no prayer requesting the sale by the sheriff, to be rescinded; and if it did, it could not avail the plaintiffs, 1 . , _ , . , n because previous to the commencement of the suit, the decree Petition had allotted the slaves in question, as a portion or a of their portion, to John and Abraham Phillips, the i, ... .. . , , , , mortgagers to Bullard, to satisfy whose debt they (the slaves) ^Ia<^ ^een s°ld- According to this view of the case, we are of opinion, that the plaintiffs have not shown title, and consequently ought not to recover the slaves by them claimed.

It is, therefore, ordered, adjudged and decreed, that, the judgment of the District Court be avoided, annulled and reversed: And it is further ordered, &c., that the judgment be here rendered, for the defendant and appellant, with costs in both cases.