I concur with my Brother Ostrander in holding that the work which this bond covers was not such as the statute contemplates, and would not have made the public officers liable for not securing a bond. It is true, however, that the public authorities, the principal of the bond, and the sureties understood that such a bond was required by the statute, or that the question was so doubtful that it would be wise to require it. ' Consequently the bond was executed and the creditors of the principal have undoubtedly relied upon it. I think the defendants are estopped now to deny its validity. They asserted in the bond that it was such as was required by the statute. They have put their own construction upon it. I think it immaterial in this case whether that con*298struction was the correct one. It ought to bind them when parties have acted upon the faith and validity of it.
I am for the affirmance of the judgment.
Blair, J., concurred with Grant, 0. J. Ostrander, J.The bond sued upon is set out in the declaration. It runs to the people of the State of Michigan. It recites the contract with the city of Detroit to furnish limestone dust for street asphalt paving mixture, to be approved in quality, to be according to specifications, to be delivered at the municipal asphalt plant at such times and in such quantities as may be required and ordered by the department of public works. It is recited that “ said contract is within the provisions of ” 3 Comp. Laws, §§ 10743-10745, and the condition is that if the principal shall execute and perform the contract, and it, or any subcontractor to whom the whole or any part of said contract may be assigned or let, shall well and truly pay, as the same may become due and payable, all indebtedness which may become due to any person, firm or corporation on account of labor performed or material furnished in the construction, erection, repairing or ornamenting of “such building, works or improvements,” then the obligation to be void. It is averred that the bond was required under the laws of the State, that plaintiff, Henry Houghten, furnished and delivered to the city, at request of the principal, certain material to apply upon the contract, has not been paid for the material furnished, has sued the principal and recovered judgment, and that thereby the bond has become operative in his favor. It appears from the plaintiff’s bill of particulars that he furnished more than 350 of the 600 tons of limestone contracted for.
It is “when public buildings, or other public works or improvements are about to be built, repaired, or ornamented under contract, at the expense of this State, or of any county, city, village, township, or school district thereof,” that it becomes the duty of the public officers contracting to require security, by bond, for the payment *299by the contractor and all subcontractors for labor and materials “furnished in the erection, repairing or ornamenting of such building, works or improvements.”
I shall assume, because it does not seem to me to require argument, that when a municipality itself buys limestone, or wood, or coal, or paving bricks, for municipal purposes, no duty is raised by this statut'e to require the contractor to give a bond to pay his men employed in making delivery of the property sold, or to pay those from whom the material may be purchased. This bond was not, so far as the protection of those- in whose interest the statute exists, one which could be legally required.
The decisions of this court in Board of Sup’rs of St. Joseph Co. v. Coffenbury, 1 Mich. 355, and in Village of Evart v. Postal, 86 Mich. 325, relied upon by counsel for plaintiff, are neither of them authority for the proposition that such a bond, if given, is valid whether or not there was statutory requirement for it. In the case first cited, the statute did require a bond to be given; in the other it was executed pursuant to an order of the village council which had the power to make such an order. Using the term voluntary in the sense of not being required by law, the bond in question was, as to condition thereof relied upon, a voluntary bond. It is said that the sureties are estopped to assert this is not a statutory bond by the recital therein that it is within the provisions of the statute. It is the general rule that they may not deny facts recited in the obligation. The recital referred to here is of a legal conclusion. Whether sureties would be in any case concluded by such a recital, we need not consider, because, in any event, while a statutory bond, defective in form, may be interpreted according to the intent of the legislative enactment (County of Bay v. Brock, 44 Mich. 45; Brockway v. Petted, 79 Mich. 620 (7 L. R. A. 740); Board of Education of Detroit v. Grant, 107 Mich. 151; People v. Laidlaw, 120 Mich. 360), such interpretation cannot enlarge or modify a bond corresponding in form precisely with the statute. In as*300suming a bond to be sufficient to give the security intended by the statute, we may not go further and assume, contrary to its express condition, that it was intended to furnish other and farther security. Plaintiff has assumed, and his declaration proceeds upon such theory, that the bond is a valid statutory bond. No breach of the condition of this bond is alleged. On the contrary, the declaration sets up the case of a creditor of one who agreed to furnish the city with certain material and the court is asked to interpret the bond not as sufficient to satisfy the legislative intent, as in form it does, but as sufficient to support the case made by the declaration which clearly is outside of the legislative intent. It is not claimed, and the declaration does not conform to the idea, that the obligation was voluntarily given to secure the plaintiff, was, in fact, relied upon by him, and is a good common-law bond for his protection. The demurrer should have been sustained.
The judgment should be reversed, the demurrer sustained, and the record remanded with leave to plaintiff to amend if so advised.
Hooker and McAlvay, JJ., concurred with Ostrander, J.