A proposal to amend the Oonstitu-. tion by adding Article XI-c so as to authorize the City of Portland to levy and collect a special tax to pay the expense of holding an exposition in 1925 was initiated by the Atlantic-Pacific Highway and Electrical Exposition and nine persons constituting the managing committee. On June 29, 1922, an initiative petition purporting to bear the signatures of 16,092 persons was presented to the Secretary of State and filed by him. Attached to the petition were’the certificates of twenty county clerks, each of whom certified in the form required by law that he had compared the signatures on a certain number of sheets *488of the initiative petition “with the signatures of said electors as they appear on the registration cards, books and blanks in” his office and that he believed the signatures of the designated number of signers “are genuine.” Of the total of 16,092 names subscribed to the petition a total of 15,514 signatures were certified by the twenty county clerks. No names were certified by a notary public. An initiative petition, to be sufficient, must bear the signatures of 13,261 legal voters.
The complaint alleges that none of the county clerks
“at the time of making his or her such respective certificate, or prior thereto, did compare or had compared any of the names or signatures so respectively certified to by him or her with the signatures of electors appearing on the registration cards, books, or blanks in his or her office, but made said respective certificates without comparing said names, or any of them, with said signatures, or any of them.”
It is further alleged that
“in truth and in fact each and every of said certificates of said county clerks was false and was not in accordance with the law and the statutes of the State of Oregon, and defendant was thereby deceived.”
The plaintiff also avers that because of the alleged false certificates the “pretended initiative petition is not legally sufficient for an initiative petition”; and the plaintiff therefore prays for a decree restraining the Secretary of State from taking any further steps for the submission of the proposed measure to the people.
The defendant filed a motion to require the plaintiff to make the complaint more definite by' alleging
“the name, address and precinct number of each petitioner to the-petition described in said complaint who is claimed by the plaintiff to be. an illegal voter.”
*489The defendant presented the motion on the theory that “any petition which is signed by the requisite number of legal voters is a legally sufficient petition,” and that
“before the plaintiff could make a showing of legal insufficiency, it is necessary to show that enough illegal voters signed the petition so that the remaining legal voters who signed, the petition would not be the requisite statutory number.”
The court ordered that the plaintiff make his complaint more definite, “by alleging the number of petitioners in each county which the plaintiff claims to be illegal voters and incompetent by reason thereof to sign said petition.” The plaintiff declined to amend, and thereupon the court decreed that the suit be dismissed; and the plaintiff promptly appealed from the decree.
The contention of the plaintiff is that if the county clerks did not actually compare the signatures on the petition with the signatures of the electors as they appear on the registration cards, books and blanks in their respective offices, the petition is invalid, even though every one of the names included in such certificates was in truth the genuine signature of a legal voter. If this contention is sustained, then it is manifest that the decree should be reversed, because any inquiry concerning the names subscribed to the petition would have been immaterial. If, however, as claimed by the defendant, the impeachment of the certificates of the county clerk does not irresistibly establish the insufficiency of the petition, and if it devolves upon the party who assails the petition to present some issue affecting the genuineness of the signatures attached to the petition, then the decree should be affirmed.
*490The disputed question must in the final analysis be determined by whatever construction is placed upon Article IV, Section 1 of the state Constitution and upon Sections 4098 and 4099, Or. L., and particularly upon the two sections of the Code. Sections 4098 and 4099 are here reproduced, except, however, the portions of the forms for the affidavit of the circulator, and of the certificates of the county clerk and notary public which relate to the venue, the signatures of the subscribers to the affidavit and certificates, and the jurat.
“Sec. 4098. Verification of Petitions. Each and every sheet of every such petition containing signatures shall be verified on the face thereof in substantially the following form, by the person who circulated said sheet of said petition, by his or her affidavit thereon, and as a part thereof: * *
• “I, -, being first duly sworn, say: That every person who signed this sheet of the foregoing petition signed his or her name thereto in my presence; I believe that each has stated his or her name, postoffice address and residence correctly,, and that each signer is a legal voter of the State of Oregon and county of * •_
“In addition to said affidavit the county clerk of each county in which any such petition shall be signed shall compare the signatures of the electors signing the same with the signatures of the registration cards, books and blanks on file in his office, shall carefully examine said petition and shall attach to the sheets of said petition containing such signatures, his certificate to the secretary of state, substantially as follows: * * “To the Honorable -, Secretary of State of Oregon:
“I,-, county clerk of the county of ---, hereby certify that I have compared the signatures on (number of sheets) of the referendum (initiative) petition attached thereto, with the signatures of said electors as they appear on the registration cards, books and blanks in my office, and from such information as I *491have been able to obtain I believe that the signatures of (names of signers) numbering (number of genuine signatures) are genuine. As to the remainder of the signatures thereon, I believe they are not genuine, except that the following names (-) do not appear on the registration cards, books and blanks in my office. * *
“Every such certificate shall be prima facie evidence of the facts stated therein and of the qualifications of the electors whose signatures are thus certified to be genuine, and the secretary of state shall consider and count only such signatures on such petitions as shall be so certified by said county clerk to be genuine; provided, that the secretary of state shall consider and count such of the remaining signatures as shall be proved to be the genuine signatures of legal voters. To establish such facts, the official certificate of a notary public of the county in which the signer resides shall be required as to the facts for each of such last named signatures. * *
“I,-, a duly qualified and acting notary public in and for the above named county and state, do hereby certify: That I am personally acquainted with each of the following named electors whose signatures are affixed to the amended petition and I know of my own knowledge, that they are legal voters of the state of Oregon and of the county written after their several names in the annexed petition, and that their residence and postoffice address is correctly stated therein, to wit: (names of such electors). * *
“The county clerk shall not retain in his possession any such petition or any part thereof for a longer period than two days for the first two hundred signatures thereon, and one additional day for each two hundred additional signatures or fraction thereof, on the sheets presented to him, and at the expiration of such time he shall deliver the same to the person from whom he received it, with his certificate attached thereto as above provided. The forms herein given are not mandatory and if substantially followed in any petition, it shall be sufficient, disregarding clerical and merely technical error.”
*492“Sec. 4099. Mandamus to Compel Filing — Jurisdiction and Procedure. If the secretary of state shall refuse to accept and file any petition for the initiative or for the referendum any citizen may apply, within ten days after such refusal, to the circuit court for a writ of mandamus to compel him to do so. If it shall he decided by the court that such petition is leg'ally sufficient, the secretary of state shall then file it, with a certified copy of the judgment attached thereto, as of the date on which it was originally offered for filing in his office. On a showing that any petition filed is not legally sufficient, the court may enjoin the secretary of state and all other officers from certifying or printing on the official ballot for the ensuing election the ballot title and numbers of such measure. All such suits shall be advanced on the court docket and heard and decided by the court as quickly as possible. Either party may appeal to the supreme court within ten days after a decision is rendered. The circuit court of Marion county shall have jurisdiction in all cases of measures to be submitted to the electors of the state at large; in cases of local and special measures, the circuit court of the county, or of one of the counties in which such measures are to be voted upon, shall have jurisdiction; in cases of municipal legislation the circuit court of the county in which the city concerned is situated shall have jurisdiction.”
It has been said that in the construction of a governmental document its history is the most satisfactory test of its meaning in the absence of direct/ positive and unambiguous language. Although it is probable that not many persons could accept such a broad statement as a proper test in all cases, for the reason that the value of the historical argument is in each instance necessarily dependent upon the, attending circumstances, it may be assumed that many will agree that the historical argument is usually helpful and ofttimes very persuasive. An examination of the *493history of legislation enacted for the purpose of preserving the integrity of initiative and referendum petitions will, because of the attending circumstances, be materially helpful in the attempt to ascertain whether the legislature intended that the impeachment of the certificates provided for in Section 4098, Or. L., would conclusively establish the invalidity of an initiative petition.
The Constitution as amended in 1902 commanded that in submitting initiative petitions to the people the Secretary of State and all other officers “shall be guided by the general laws and the acts submitting this amendment, until legislation shall be especially provided therefor.” It may be assumed, without deciding, that it is competent for the legislature to declare that certificates by notaries public and county clerks shall be the exclusive evidence by which not only the Secretary of State, but also the courts acting on cases presented to them, shall be governed in passing upon the legal sufficiency of an initiative petition; and, therefore, beginning with such assumption the investigation will proceed and be confined to an attempt to ascertain the legislative intent.
At the next session after the adoption of the initiative and referendum amendment to the Constitution, the legislature enacted a statute “making effective the initiative and referendum provisions” of the Constitution, “and reg'ulating elections thereunder.” Laws 1903, p. 244. Section 3 of this act provided for certificates of county clerks and for certificates of notaries public, with the further provision that certificates of county clerks “shall be prima facie evidence of the facts stated therein.” Indeed, Section 3 of the act of 1903 is in all respects substantially the same as Section 4098, Or. L., except that the latter *494does and the former did not require verification' by the affidavits of the circulators of the petition.
Section 4 of the act of 1903 commanded the Secretary of State to
“decide in the first instance whether or not the petition entitled the parties to have the measure referred to the people * * and either the petitioners or the remonstrants, if any, may appeal to the supreme court of the state from the decision of the secretary of state.”
In 1907 the legislature repealed the act of 1903 and in its stead enacted a more complete statute for carrying into effect the initiative and referendum powers:- Chapter 226, Laws 1907. Section 4099, Or. L., is Section 4 of the act of 1907; and it is highly significant that this section has never been amended, while Section 3 of the act of 1907, now Section 4098, Or. L., was amended in 1913 and again in 1917. As originally enacted Section 3 merely required the circulator of the petition to verify the signatures by an affidavit, “on the back” of the petition, that the petitioners signed their names in his presence and that he believed that
“each has stated his name, postoffice address and residence correctly, and that each signer is a legal voter of the state of Oregon.”
It is said that the county clerks protested against the law of 1903 “because of the extra labor it required from them when they were burdened with the nominating and general elections,” and that because of such protest a change was made in 1907. However, the forged and fictitious names attached to referendum petitions in 1912 demonstrated the need of a stronger safeguard than was afforded by Section 3 of the act of 1907; and so in 1913 Section 3 of the *495act of 1907 was amended by requiring the circulator to verify the petition “on the face thereof” by an affidavit substantially in the form now prescribed by Section 4098, Or. L.: See Friendly v. Olcott, 61 Or. 580 (123 Pac. 53); State ex rel. v. Olcott, 62 Or. 277 (125 Pac. 303). In 1917 -Section 3 of the act of 1907 was further amended by adding the now existing provisions concerning certificates of county clerks and notaries public; and, as previously stated, these provisions for such certificates are substantially the same as the provisions found in Section 3 of the act of 1903. . Thus it is seen that the determination of the Secretary of State has never been final and conclusive, but there has always been a method provided for re-examining his decision; under the act of 1903, by an appeal to the Supreme Court; under the act of 1907, by a lawsuit brought for the purpose of judicially passing upon the legal sufficiency of the petition. Moreover, since Section 4099, Or. L., has never been amended, but now reads the same as it did when enacted it is reasonable to assume that if as originally enacted this section contemplated the right to maintain a lawsuit and to offer evidence for and against the legality of signatures it still contemplates the right to prosecute a lawsuit to determine, with the aid of all available evidence, whether a petition is signed by legal voters.
Now let us give attention to Section 4099, Or. L., remembering throughout the examination that it is now in its present form exactly the same as it has always been since 1907 when it was enacted. This section anticipates the possibility of the refusal of the Secretary of State to file a petition and accordingly declares that any citizen may by mandamus test the legal sufficiency of a petition; and so, too, this *496section anticipates the possibility of the Secretary of State filing a petition which is not legally sufficient, and accordingly, “the court may enjoin” the Secretary of State and all other officers from certifying’ or printing the title and numbers of the measure on the official ballot “on a showing that any petition filed is not legally sufficient. ’ ’ The Secretary of State can be compelled to file a petition only “when it is legally sufficient”; and he can be enjoined only when it is “not legally sufficient.” Whether the proceeding is one for a writ of mandamus or for an injunction, the inquiry made by the court is: Is this petition legally sufficient? In State ex rel. v. Olcott, 62 Or. 277, 279 (125 Pac. 303), construing Section 3474, L. O. L., now Section 4099, Or. L., it was held that the words “legally sufficient” meant “a valid petition, signed by legal voters, and complying substantially,” not necessarily technically, “with the requirements of the law.” In other words, a petition to be legally sufficient must be: (1) In form substantially as prescribed by statute; and (2) signed by the required number of legal voters. While the question is not here for decision, the writer is of the opinion that a petition without the affidavit of the circulator or a petition having the affidavit of the circulator, but without the certificate of a county clerk or notary public would be legally insufficient, because not in the form required by statute and because without any evidence concerning the signatures of the petitioners and in such a case it would be the duty of the Secretary of State to refuse to file the petition and it would likewise be the judicial duty of the courts to declare that such petition is “not legally sufficient.”
Manifestly Section 4099, Or. L., contemplates that the courts may inquire and judicially ascertain *497not only whether an initiative petition is presented in a form substantially like the form prescribed by the statute, but also whether it is signed by a sufficient number of legal voters. Under the act of 1907 as it read prior- to the amendment of 1913 a petition which bore the outward appearance of a legally sufficient petition could be subjected to judicial scrutiny and the courts were empowered to ascertain whether such seemingly sufficient petition bore forged or fictitious signatures. The affidavit of the circulator was only prima facie evidence; it was not conclusive evidence: State ex rel. v. Olcott, 62 Or. 277, 279 (125 Pac. 303). Section 4099, Or. L., contemplates that whenever an appropriate judicial proceeding is initiated and prosecuted either to compel the filing of a petition or to restrain the Secretary of State from taking further steps with a petition which he has filed, the court can inquire whether the petition is signed by a sufficient number of legal voters; and this judicial inquiry can only be prosecuted upon pleadings and the truth can be ascertained only by the aid of evidence concerning not only the legality but also the illegality of the signatures. Section 4099, Or. L., is utterly devoid of any suggestion or intimation that no evidence can be offered concerning the legality of the signatures; but upon the contrary this section standing alone implies that the question of the legality of the signatures is triable according to the established rules of pleading and evidence which ordinarily prevail in a lawsuit. In short, if • the proponents of a petition offer it for filing and the Secretary of State refuses to file it, they must allege and prove that the petition is sufficient, and in such a case the proponents present a prima facie case when they .offer a petition which in *498form is substantially as prescribed by tbe statute; and so, too, if a petition filed by tbe Secretary of State is assailed on tbe ground that it is not legally sufficient those who assail such petition must allege such insufficiency. Indeed, Section 4099, 'Or. L., implies the necessity of allegation and proof, for the language of this section is: “ On a showing that any petition filed is not legally sufficient.”
In the instant case it is not alleged that the petition contains the signatures of any who are not legal voters. The attack made against the petition is confined to the charge that the county clerks made the certificates without comparing the signatures on the petition with the signatures of the electors as they appear on the registration cards, books and blanks. It is argued by the plaintiff that proof that the county clerks did not make such comparison invalidates the petition notwithstanding it is sufficient as to form and is signed by the required number of legal voters. This contention rests upon the language employed in Section 4098, Or. L.
It is declared in Section 4098, Or. L., that the certificates of the county clerk
“shall be prima facie evidence of the facts therein, and of the qualifications of the electors whose signatures are thus certified to be genuine.”
The county clerk is a witness and his certificate furnishes evidence of his qualification to speak as a witness and is also evidence concerning the signatures attached to the petition. If the certificate is sufficient in form it presents: (1) Evidence of the qualification of the witness to testify concerning the signature to the petition; and (2) evidence that the ■signatures attached to the petition are the genuine signatures of legal voters. But this evidence concerning his qualification as well as concerning the genuine*499ness of the signatures is only prima facie evidence of such facts, and the circumstance that it is prima facie evidence necessarily implies that such evidence may be contradicted in an appropriate judicial proceeding not only as to the qualifications of the witness, but also as to the legality of the signatures; and assuredly if it may be contradicted it may be supported by other evidence in such judicial proceeding, for the language “prima facie evidence of the facts stated therein” imply the right to offer supporting-evidence just as strongly as it implies the right to offer contradicting evidence. Nowhere is it stated expressly or impliedly that only such extraneous evidence may be offered in a judicial proceeding as tends to contradict the prima facie evidence of the certificate. “When a petition bearing the requisite number of signatures and in form substantially like the form prescribed by the statute and therefore hearing prima facie evidence of the legality of the signatures is presented to the Secretary of State he is warranted in filing it, because he looks. to the petition itself and not to extraneous evidence for his warrant for filing the petition. If, however, as is the case here, a seemingly sufficient petition is assailed after it has been filed by the Secretary of State but before it has been submitted to the people and acted upon by them at an election, extraneous evidence may be offered in contradiction and in support of the evidence in the certificate concerning the qualification of the county clerk and also in contradiction and in support of the evidence concerning the legality of the signatures.
The complaint in the instant case merely alleges that the county clerk as a witness was not qualified to testify concerning the legality of the signatures. The complaint attacks' the evidence of legality and not the legality of the signatures. The end sought *500to be attained is the signing by a sufficient number of legal voters. The affidavit of the circulator and the certificates of county clerks and notaries public are mere forms and evidence designed to accomplish the end sought to be attained. The affidavit and the certificates are forms while the signatures of legal voters are the substance.
The complaint in the instant case attacks the prima facie evidence of the legality of the signatures and does not present any issue as to whether the signatures are in truth the signatures ■ of legal voters. Genuine signatures of legal voters constitute the vitalizing element of a petition, and all else is mere form and evidence. Even though the prima facie quality of the evidence furnished by. the certificate of the county clerk is destroyed by proof that he did not qualify himself to speak as a witness by making the comparison required by statute, there yet remains a petition sufficient in form, and if the petition is in truth signed by a sufficient number of legal voters, it is a legally sufficient petition within the ruling expressed in State ex rel. v. Olcott, 62 Or. 277, 279 (125 Pac. 303). Impeachment of the evidence furnished by the certificate does not foreclose inquiry concerning the truth; and the truth can be learned only by a consideration of all available evidence relating to the genuineness of the signatures. In my opinion, Section 4099, Or. L., of itself plainly implies the right of trial in a court according to established rules of procedure at which those who assail the petition may offer evidence of the illegality of the signatures and those who seek to sustain the petition may offer evidence of the legality of the signatures ; and when Section 4098, Or. L., is considered in the light of its history and in connection with Section 4099, Or. L., the implication becomes still *501stronger. In short, a complaint which merely alleges that the county clerk who made a certificate did not compare the signatures in the mode prescribed by statute is only an attack upon evidence and not an attack upon substance, and does not state a cause of suit; but to be a good complaint it must contain an allegation attacking the signature attached to the petition.
Upon proof that the county clerk did not compare the signatures’ in the mode required by the statute his certificate loses its prima facie quality, and the defendant must then, as ruled in State ex rel. v. Olcott, 62 Or. 277, 285 (125 Pac. 303), go forward and offer evidence tending to establish the legality of the disputed signatures: See, also, Askay v. Maloney, 92 Or. 566, 575 (179 Pac. 899); Hansen v. Oregon-Wash. R. & N. Co., 97 Or. 190, 211 (188 Pac. 963, 191 Pac. 655); Simms v. Sullivan, 100 Or. 487, 494 (15 A. L. R. 678, 196 Pac. 240); State v. Rosasco, 103 Or. 343 (205 Pac. 290, 295). A careful analysis of the opinion in State ex rel. v. Olcott, 62 Or. 277 (125 Pac. 303), will show that nearly every question involved in the instant case is decided by that precedent.
The trial court properly ruled that the plaintiff ought to make some allegation concerning the legality of the signatures. However, the plaintiff ought not to be permitted to make a blanket allegation that all the signatures are illegal, but he should be required to aver the illegality of a sufficient number of signatures to invalidate the petition and to allege the number of signatures in each county claimed to be illegal. Each case must depend to some extent upon its own circumstances and much must be left to the judicial discretion of the trial court when the pleadings are framed. If a petition is sufficient in form *502then the ultimate inquiry is: Are there sufficient genuine signatures of legal voters to make the petition “legally sufficient”? The plaintiff refused to present by pleading or otherwise any issue concerning the validity of signatures,• ^and consequently the Circuit Court properly dismissed the suit. The decree ought to be affirmed. Affirmed.