delivered the opinion of the court.
This was a petition, in the Supreme Court of the District *689 of Columbia, for a writ of mandamus to' compel the Secretary of the Interior to accept, as conforming'to the Timber and Stone Act of June 3, 1878, 20 Stát. 89, c. 151, an application to purchase under that act 160 acres of рublic land in the Ro'seberg, Oregon, land district. The respondent answered, but the answer was held insufficient upon demurrer, and judgment was entered awarding the writ as prayed. An appeal to the Court of Appeals resulted in a reversal оf the judgment, with a direction that the petition be dismissed, 33 App. D. C. 302, and that ruling is now here for review.. Briefly stated, the material facts are these: Being desirous of purchasing the land under the Timber and Stone Act, the relator, Mary S. Ness, filed in the proper local land office a written application, which fully conformed to the statutory requirements,, unless it was objectionable in that it disclosed that she had not personally examined .the land and that her statement that it was unfit for cultivation, valuable chiefly for its timber, uninhabited and contained no mining or other improvements was made upon information and belief and not upon personal knowledge. The register and receiver ruled that the apрlication was objectionable in that, regard and therefore rejected it, subject to her right to appeal.. Successive appeals by her to the Commissioner of the General Land Office and the Secretary of the Interior resulted in an affirmance of the ruling of the local officers, the .decision of the Secretary being ’adhered to upon a motion for review. Soon after the act was passed it was construed by the . Land Deрartment as requiring that in applications, thereunder the statement respecting the character and condition of the land be made upon the personal knowledge of the applicant, save in the particulars which the act declares may be stated upon belief, and it was because of this construction, disclosed in repeated decisions of the Secretary of the Interior ;and in the regulations issued under the act (see 6 Land Dec. Í14; 11 Land. *690 Dec. 599; 32 Land Dec. 631), that this application was rejected. After its final rejection, that is, after the decision of the Secretary on the motion for review, one William A- Taylor made application at the local land office to purchase the land under the same act, and his application, which appeared to be in conformity with the statutory requirements, was accepted by the local officers and was being, carried to final entry when this petition and the answer were filed.
The answer concluded by alleging, in substance, that the respondent was the head of the Land Department, to which the law committed the administration of the Timber and Stone Act and other public land laws; that the duty of determining whether the relator’s application conformed to the statutory requirements was not merely ministerial, but involved the exercise of judgment and discretion; that to compel him to accept that application would be to control his judgment and discretion, and to require him to. disregard his own decision, in a matter falling within his lawful authority, and that a writ of mandamus could not be used to that end.
Section 2 of the act reads as follows:
“That any.person desiring to avail himself of the provisions of this act shall file with the register of . the proper ■district a written statement in duplicate, one of which is to be transmitted to the General Land Office, designating by legal subdivisions the particular tract of land he desires to purchase, setting forth that the same is unfit for cultivation, and valuable chiefly for its timber or stone; that it is uninhabited; contains no mining or other improvements, except for ditch or canal purposes, where any such do exist, save such as were made by or belonged to the applicant, nor, as deponent verily believes, any valuable deposit of gold, silver, cinnabar, copper, or coal; that deponent has made no other application under this act; that he does not apply to purchase the • same on speculation, *691 but in good faith to appropriate it to his own exclusive use and benefit; and that he has not, directly or indirectly, made any agreement or contract, in any way or manner, with any person or persons whatsoever, by which the title which he might acquire from the government of the United States should inure, in whole or in part, to the benefit of any person except himself;, which statement must be verified by the oath of the applicant before thе register or the receiver of the land office within the district where the land is situated; and if any person taking such, oath shall swear falsely in the premises, he shall be subject to all the pains and penalties of perjury, and shall forfeit the money which he may have paid for said lands, and all right and title to the same; and any grant or conveyance which he may have made, except in the hands of bona fide purchasers, shall be null and void.”
The Secretary’s decision, rejecting the relator’s application, was not arbitrary or capricious, but was based upon a construction of § 2 which was at least a possible one, had long prevailed in the Land Department, had been approved in United States v. Wood, 70 Fed. Rep. 485, and Hoover v. Salling, 102 Fed. Rep. 716, and has since been sustained by the Court of Appeals in the present case. True, a different constrúction had been adopted in Hoover v. Salling, 110 Fed. Rep. 43, and has since been followed in Robnett v. United States, 169 Fed. Rep. 778, but this, instead of indicating that the Secretary’s decision was arbitrary or capricious, illustrates that there was room for difference of opinion as to the true construction of the section, and that to determine whether the relator’s application conformed thereto necessarily involved the exercise of judgment and discretion.
So, at the outset we are confronted with the question, not whether the decision of the Secretary 'was right or wrong, but whether a decision of that officer, made in the discharge of a duty imposed by law and involving the
*692
exercise of judgmént and discretion, may be reviewed by mandamus and he be compelled to retract it, and to give effect to another not his own and not having his approval.. The question is not new, but has been often сonsidered by' this court and uniformly answered in the negative.
Decatur
v.
Paulding,
The relator seems to believe that
Roberts
v.
United States,
We conclude that .the decision of the respondent in thе present case was not arbitrary or merely ministerial, but made in the exercise of judgment and discretion conferred by law and not controllable by mandamus, and therefore that the Court of Appeals rightly directed that the petition be dismissed.
Judgment affirmed.
