delivered the opinion of the Court.
This is an action of ejectment brought by complainants to recover an undivided interest in a tract of land situated in Shelby county. The chancellor decreed for the complainants, and the defendants have appealed and assigned errors.
*592The complainants are the widow and children of Joe Wilson, colored, deceased, and the defendants are his half-brothers. The proof fairly shows that the common ancestor, Phil Wilson, was married first to the mother of the defendants, and, after the death, to the mother of Joe Wilson, in the State of Mississippi, according to the custom of slaves. Therefore Joe Wilson, the ancestor of complainants, was a brother of the half blood to the defendants. Phil Wilson died the owner of the land in litigation. After the death of Susan, the mother of Joe, Phil .Wilson removed himself and family from the State of Mississippi to the State of Tennessee, and resided here until his death.
Complainants predicate their claim to an interest in the land sued for upon section 4179 and section 4183 of Shannon’s Code, as follows:
“4179. All free persons of color who were living together as husband and wife in this State while in a state of slavery, are hereby declared to be man and wife, and their children legitimately entitled to an inheritance in any property heretofore acquired, or that may hereafter he acquired, by said parents, to as full an extent as the children of white citizens are entitled by the laws of this State.”
“4183. Section 4179 shall include in its provisions persons of color who have been living as man and wife in other States, and who have moved to this State; and sections 4180, 4181, and 4182, are appli*593cable to such persons and their issue, whether horn in this State or elsewhere.”
We think it clear that section 4179 does not apply to the case made by complainants, for the reason that Phil Wilson and Snsan were not living together !as husband and wife in this State at the time of the birth of Joe Wilson. This is conceded by complainants, hut they say that section 4183 applies and gives them a joint interest with defendants, in the estate of their common 'ancestor. Section 4183 is drawn from chapter 151, Acts of Tennessee 1887, which is as follows:
“An act to amend the laws of descent and distribution; and to amend sections 3285, 3286, 3287, and 3288 of the Revised Code.”
“Section 1. Be it enacted by the General Assem bly of the • State of Tennessee, that section 3285 of Milliken & Yertrees’ Code he so amended as to include in its provisions persons of color, who have been living as man and wife in other States, and who have moved to this State; and that sections 3286, 3287, and 3288 of Revised Code be applied to such persons and their issue, whether born in this State or elsewhere.”
A question is made upon the application of this act. It is said for defendants that it does not apply because Phil Wilson and Susan, did not remove to Tennessee together. It is replied to this that Susan died before Phil, the head of the family, removed to *594Tennessee, and that complainants are within the intention of the statute. This is perhaps true, hut, because of another question made by defendants, it is not necessary to decide the point.
The amendatory act is assailed as being unconstitutional for the reason that it violates section 17 of article 2 of the Constitution of this State, which' requires that:
“All acts which repeal, revive or amend former laws, shall recite in their caption, or otherwise, the title or substance of the law repealed, revived or amended. ’ ’
In Burnett v. Turner, 87 Tenn., 126, 10 S. W., 194, 195, it was held that an act was void which referred to the law to be amended as “section 2746 of the Revised Code.” In this case it was said:
“There is no ‘Revised Code’ of Tennessee, the legislature not having adopted or enacted any compilation of our statutes as such since the enactment of the Cole in 1858, which, being the first Code, is not itself a revision. It therefore follows that it is not the amendment of a recognized law to amend the ‘Revised Code,’ nor is it necessarily the amendment of a law to amend any section of such supposed Code by number. It may he that in point of fact a given section of any compilation to which the legislature might refer, -and specifically identify in an amending act, would turn out to be a correct reprint of an existing law; but it is not so by force of its existence in such compilation, or by reason of its hav*595ing a particular sectional number therein, as is the ease in the Code enacted. Therefore, to make an amending act valid, there must he something more than the recitation in the act of 1887. It will he remembered that, while we have no ‘Revised Code’ in law, we have in fact two valuable compilations of the statutes of Tennessee, to either of which this term is often applied, and to both of which it can he applied with equal accuracy.
“If it he assumed, as argued, that one of them is referred to, it cannot he told which. Neither is identified by any distinctive legal term applicable to it, or more applicable to it than to the other. Nor is the identification made or attempted by designation of the compilers or otherwise. So that not only is no law, by title or substance, recited in the repealing statute, hut no law is referred to, and, worse still, no book in which it can he found is named or identified in the reference.”
See Memphis St. Ry. Co. v. State, 110 Tenn., 598, 75 S. W., 730.
Under the foregoing authority the reference in the title of the act in question to the sections of the Revised Code must he eliminated, and the title read without reference to that part. So read, it would he “An act to amend the laws of descent and distribution.” Such a title falls under direct condemnation in the case of Shelton v. State, 96 Tenn., 522, 32 S. W., 967. The act condemned in that case was en*596titled “An act to amend the criminal laws of the State. ’ ’
We have no enactment of the legislature entitled the “Laws of Descent and Distribution.” There is a body of law upon this subject, but it is found in the statutes enacted by the legislature and the decisions of this court, as well as. decisions of other courts, the text-writers, and the great body of the common law which is in force in this State. So we think that the recital in the act is insufficient.
It is said that this statute has been in force so long that it should be upheld because of its age and the acquiescence of the public. To this we reply that we never declare any statute unconstitutional unless it appears beyond reasonable doubt that it violates some specified part of the fundamental law. That this act does so there can be no doubt. It has been held by this court that the lapse of a long-length of time alone is not sufficient to validate an otherwise invalid law nor to prevent this court from declaring such a law to be invalid when it plainly appears to be so. Gribble v. Wilson, 101 Tenn., 616 49 S. W., 736. In that case it was said:
“It is not the province or practice of this court to seek out constitutional defects in the acts of the General Assembly. Indeed, all intendments are in favor of the laws as passed, and the court will only pass upon their validity when it is raised and fully presented to the court. Henley v. State, 98 Tenn. (14 *597Pickle), 682, 41 S. W., 352, 1104, 39 L. R. A., 126. The fact, therefore, that an act has been construed and enforced and passed upon by this court is not conclusive of its validity and constitutionality, and this question may be raised at any time when the facts and pleadings justify its consideration.”
It is also said that the defendants are estopped to question the validity of the act because their claim of title is under it, and both parties claim to a common source. In actions of ejectment the complainant must recover upon the strength of his own title. Hubbard v. Godfrey, 100 Tenn. (16 Pickle), 150, 47 S. W., 81. The source of title common to both parties is an invalid enactment of the legislature. The reason underlying the rule forbidding either party in ejectment to deny the common source of title is that one cannot dispute the title by which he claims. The complainants claim under the marriage with Susan and through the amendatory act. The defendants are in possession, and while they are children of Phil Wilson, they were born of the first marriage, and are not children of Susan. They therefore do not claim to a common source of title. The amendatory act can have no application to them.