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 to cancel the tax certificates delivered to the New England Investment Company at the tax-sale of 1886, and also vacate of record the tax proceedings on which the sale was made. It seems clear that, inasmuch as the county treasurer was not a party to the former action, that, if that action had culminated in a judgment for the plaintiff adjudging that the tax of 1885 on plaintiff’s lands be canceled and set aside, and further directing that Ramsey county be enjoined from selling the plaintiff's lands for such taxes, such judgment would have been inoperative, and wholly ineffectual to accomplish either or any purpose sought to be accomplished by such judgment. Under the revenue laws of the territory, county treasurers, after receiving the tax duplicate, and while collecting the tax by distraint of personal property or sale of real estate, act under statutes which regulate and prescribe their duties, and which are mandatory upon them as tax collectors. While in the discharge of their duties as tax collectors, county treasurers act independently, and are beyond any interference or supervisory control by the county commissioners. The treasurer and his official sureties are responsible for the collection of the tax which appears upon the duly-authenticated tax duplicate, and if such tax is not voluntarily paid the payment must be enforced in the manner directed by the statute. It follows from these provisions of the revenue laws that the county of Ramsey would have been powerless, even if directed so to do by the judgment of the district court, to have prevented its treasurer from selling the plaintiff's lands for the taxes in question. The terms of the statute requiring the treasurer to sell lands for delinquent taxes are imperative, and no legal power exists, except in a competent court, to interfere with or prevent the sale. Nor could a court enjoin such sale without first obtaining jurisdiction of the person of the officer who is required to make the sale, viz., the county treasurer. It is equally clear that, had a decree been made in the former action directing the cancellation and annulment of the tax proceedings and levies of 1885, the same would have been idle and inoperative. The records of the tax assessments and levies in question were contained in record books in the official custody of certain city and county officials, who were strangers to the