Separate actions were instituted in the chancery court of Poinsett County by the commissioners of Water District No. 1 and Sewer District No. 2 of the town of Lepanto against W. B. Ballard and others, appellees, for the collection of alleged delinquent improvement district taxes, penalty and costs, and praying that liens be declared on the real property in the district and that same be subject to the payment of the delinquent taxes and penalties. The lands alleged to be delinquent were described and the amount of the assessments thereon set forth in a list which was attached as an exhibit to the complaint. There was an answer in each of the actions by property owners of the district, denying all the material allegations of the complaints, and raising the only issue involved here, to-wit, that the lands upon which the benefits were assessed and upon which liens are sought were not benefited and could not be benefited by the improvements because they were not connected with the present improvements, and it was not contemplated that they would be connected, and that the assessments sought to be collected bv this action were therefore void.
The causes were, by consent, consolidated and heard by the chancellor. The court heard the consolidated *836cause upon the pleadings, exhibits, depositions of witnesses, stipulation of counsel, and the maps of the improvement districts, from all of which the court found as follows:
That a certain tract of land belonging to the Union &• Planters'’ Bank & Trust Company, lying east of Little River and east of J. R. Hirschman’s. 4th Addition, containing about forty-two acres, and part of another tract lying east of Little River and west of the town of Lepanto, containing twenty acres, received no benefit whatever from the construction of the water and sewer improvements, and canceled the assessments on these tracts. The court further found that certain lots belonging to the Union & Planters’ Bank and Trust Company in J. R. Hirschman’s 4th Addition and certain lots and blocks in J. R. Hirschman’s 3rd Addition, and also certain lots and blocks belonging to J. R. Hirschman and Wilna Hirschman in J. R. Hirschman’s 4th Addition to the town of Lepanto, all of which are -described in the decree, had received no benefit from the sewer improvement district, and canceled and set aside the assessment for such sewer improvement district. But the court further found that this same property had received benefits from the water improvement 'district, land that the assessment for the water improvement district should be sustained. The court entered a decree according to its findings, permanently enjoining the collection of the assessments on the acreage property for both the water and sewer improvements and enjoining the collection of the assessments on the other property, that is, the property consisting of the lots and blocks in the town of Lepanto, for the sewer improvement, but declaring a lien and ordering the assessments paid on the lots and blocks in the town of Lepanto for the water improvement. This appeal by the districts and their 'Commissioners challenges the court’s decree canceling the assessments and denying the collection on the acreage property for both the water and sewer improvements, and also the decree canceling the assessments and enjoining the col*837lection thereof on the town lots for the sewer improvements, and the appeal by the appellees challenges the decree declaring a lien on the town lots for the amount of the assessment thereon for the water improvement, and awarding the collection of the assessment for such improvement.
Every question at issue on these appeals is ruled by the opinion of this court in the case of Carney v. Walbe, ante p. 746. In the above case, among other things, we ■said:
“Where the property owner delays until after the period of time prescribed by statute for a direct attach on the action of the council establishing the district, and the assessment of benefits to the real property situated therein, a suit by the property owner to review the proceedings of a common council establishing the district or the board of assessors in assessing the benefits to the real property within the district is a collateral attack, and such proceedings can only be set aside when they appear on their face to be demonstrably erroneous.” .
In this case we reviewed former cases, especially the cases of House v. Road Improvement District, 158 Ark. 350, 357, 251 S. W. 12, and Blytheville v. Baker, 171 Ark. 602, 286 S. W. 945. The effect of our holding in these cases is that, on .collateral attack, what is' meant by a “demonstrable mistake” is such a mistake as can be shown only on the face of the record of the proceedings creating the district or assessing the benefits. Extraneous testimony, such as that of engineers and others, tending to prove that certain portions of the territory embraced in the district could not and would not be benefited by the improvements contemplated, is not relevant and competent on collateral attack. Such testimony is only competent and relevant where a direct attack is made by property -owners affected on the proceedings creating the districts and laying the assessments of benefits. The opportunity given property owners under the law to make such direct attack is due process; if they let this opportunity pass, they have no *838right to call in question the regularity of the proceedings either in creating the districts or laying the assessment of benefits, except where it can be demonstrated by an examination of the record itself creating the districts and laying the assessments that a mistake has been made. Such is the effect of our"decisions as shown by the review thereof and the conclusion reached in the case of Carney v. Walbe, supra. See also Stiewel v. Fencing District No. 6 of Johnson County, 71 Ark. 17, 70 S. W. 308, 71 S. W. 247; Board of Improvement v. Offenhauser, 84 Ark. 257, 105 S. W. 265; 25 R. C. L. 592; Hibben v. Smith, 191 U. S. 310, 24 S. Ct. 88, 48 L. ed. 195.
It would be supererogation to pursue the matter further.
The cross-actions by the defendants, in the case at bar are collateral attacks upon the assessments Which are sought to be collected by the original complaints herein. It is conceded that all the proceedings were regular under which these districts were created and the benefits assessed, but it is contended by the property owners who are resisting the collection of assessments that these assessments were void because their property was not benefited. If the testimony of the engineers were competent to prove such fact on this, collateral attack, we would agree with the learned chancellor that such testimony in this case is sufficient to prove that the property here involved is hot benefited. But we have examined the maps and plats showing the territory embraced in the districts and the topography thereof, with reference to the town of Lepanto, and it is impossible, to conclude from the face of the record of the proceedings creating the districts and assessing the benefits that the lands on which’the assessments are soug’ht to be collected are not benefited by the improvements. Certainly the fact that Little River runs'through the town and separates certain portions of the lands embraced in the districts, and that certain of these lands are shown to be acreage or farming territory, is not sufficient to show a demonstrable mistake in the assessment of benefits on the property'in *839controversy. There is nothing on the face of the record of the proceedings creating the districts and making the assessments from which the court will take judicial notice that there was a demonstrable mistake in making the assessments. As we have already seen, in this collateral attack on the assessments the testimony of engineers is not competent, under our decisions, for the purpose of demonstrating that a mistake was made in the proceedings creating the districts and making the assessments. The time for that has passed.
It follows that the decree of the court annulling the assessment on the acreage property for both water and sewer improvement is erroneous, and the same is reversed, and remanded with directions to dismiss the cross-complaints and to grant the prayer of the original complaint for the collection of the delinquent assessments on the acreage as well as on the town lots and for both-the water and sewer improvements. It follows also that so much of the decree as awards the collection of the assessments on the town lots for the water improvement is correct, and it is therefore affirmed.