delivered the opinion of the Court.
This suit was brought in October, 1925, by the Standard Oil Company- in the Supreme Court of the District of Columbia against Dr. Work, the then Secretary of the Interior, to enjoin the continuation of proceedings in the local land office at Visalia, California, ordered by him with a view to ascertaining and determining whether particular lands were known to be mineral in character when the survey of them was accepted. State of California, Standard Oil Co., Transferees, 51 L. D. 141. Upon his resignation, Secretary West was substituted as defendant. The proceedings were of the kind commonly employed by the Secretary of the Interior to ascertain the existence of alleged facts reported by a representative of the General Land Office, because of which the title of one claiming public lands is questioned in the Department. The Register and Receiver, after hearing the parties in interest,, make report of their findings. These are subject to an appeal, on the evidence, to the Land Commissioner, and also to a further appeal to the Secretary. Upon the ultimate findings, the Commissioner decides, subject to the supervision and control of the Secretary, what action, if any, shall be taken. Compare George W. Bally, 41 L. D. 295, 299. Circular No. 460, February 26, 1916, 44 L. D. 572, prescribes the procedure.
The proceedings here involved concern Section 36, Township 30 South, Range 23 East, Mount Diablo B.
&
M. — that land being in Elks Hills, Kern County, California. Section 36 is one of the sections in each township which, if not mineral or otherwise disposed of, was
*208
granted by Congress to the State of California in aid of public schools, by Act of March 3,1853, c. 145, § 6,10 Stat. 244, 246. Under patents issued by the State in 1910, and mesne conveyances, the Standard Oil Company claims title to part, and an interest in the rest, of the section. Drilling on this land, begun in 1918, has been followed by extensive oil mining, operations. The proceedings were based on a charge that on January 26, 1903, the date of the approval of the survey, the land was known to be mineral in character. If the land was then known to be mineral, the title confessedly did not pass by the Act. For Congress excluded mineral land from the grant.
Mining Co.
v.
Consolidated Mining Co.,
The Act of 1853 here involved, like those granting school lands to many other States, 1 makes no provision for determining what part of the land is thus excluded from the grant. It does not provide for the issue of patents or for any equivalent action by the Department to evidence the transfer of title to the State. No patent to the State, or *209 evidence of title or interest in another, has in fact been issued by the Secretary of the Interior. Nor has there been in the Department any contest between the State and another claimant which might have resulted in a determination of the character of the land. Whether this land was known to be mineral at the date of the survey must, therefore, be established otherwise. The Standard Oil Company contends that its non-mineral character had, before Secretary Work’s order, been established by a final determination in the Department; that thereby the Depart-ment lost jurisdiction over the land; and that, for this reason, continuation of the proceedings should be enjoined. 2
It is true that among the several officers of the Land Department action had repeatedly been taken having some relation to the character of the land prior to the order of Secretary Work. The survey, which was approved January 26, 1903, returned it as mineral.. In 1904, a special agent reported it as non-mineral. In 1908, it was temporarily withdrawn from agricultural entry pending examination and classification by the United States Geological Survey. In 1909, the Director of the Geological Survey classified it as oil land. In 1910, the Secretary recommended its withdrawal for a petroleum reserve and the recommendation was approved by the President. In 1912, it was placed in Naval Petroleum Reserve No. 1. On January 14, 1914, the proceedings in the land office here involved were initiated. The papers having been mislaid or misfiled in-the local office, the proceedings lay dormant; and process was not served until after March 2, 1921. Then the Register and Receiver were ordered by the Land Commissioner, under Secretary Payne, to proceed in accordance with Circular No. 460. On June 9, *210 1921, before further action thereon, Secretary Fall directed the Land Commissioner to dismiss the proceedings and notify all parties in interest of the dismissal.
On May 8, 1925, Secretary Work vacated Secretary Fall’s order and directed the Register and Receiver to proceed to a hearing of the charge that the land was known to be mineral in character on January 26, 1903.
3
'If at .the time of . Secretary Work’s order the Department still had jurisdiction of the land, he possessed the power to review the action of his predecessor and to deal with the matter as freely as he could have done if the dismissal of the proceedings had been his own act or that of a subordinate official. For, so- long as the Department retains jurisdiction of the land, administrative orders concerning it are subject to revision. New
Orleans
v.
Paine,
In support of its contention that the jurisdiction had ended, the Company relied in its bill upon two earlier acts of the Department, besides Secretary Fall’s order, as constituting a final determination that the land was not known to be mineral at the date of the approval of the
*211
survey. The Supreme Court of the District did not pass on the legal effect of the two other acts. Upon the stipulated facts it ruled and found: (1) That Secretary Fall had jurisdiction to determine the known mineral character of Section 36, without awaiting the trial by the local land office and appeals from the findings there made. (2) That the Secretary granted a hearing before himself for the purpose of determining the issues raised by the proceedings and gave notice to all parties in interest of such hearing. (3) That he'had before him evidence which he had a right to consider and which supported his dismissal of the proceedings. (4) That he dismissed the proceedings after a consideration of the law and facts and directed that the parties in interest be notified of the. dismissal and that the case be closed on the records. (5) That the order of dismissal was reduced to writing by his direction and was a judicial determination of the known mineral character of the land on January 26, 1903. (6) That the order of dismissal reduced to writing was a judgment on the merits, and its correctness could not be questioned by collateral •proceedings, except for fraud. A decree for a permanent injunction was entered.' That decree was affirmed'by the Court of Appeals of the District, 57 App. D. C. 329, 23 F. (2d) 750. This Court granted a writ of certiorari,
Ordinarily, where an act granting public lands excludes those known to be mineral, the determination of the fact whether a particular tract is of that character rests with the Secretary of the Interior. See
Cameron
v.
United States, 252
U. S. 450, 464;
Burke
v.
Southern Pacific R. R. Co.,
The Standard Oil Company contends that Secretary Fall determined that the land w,as not known to be mineral on January 26, 1903; and that this determination In the informal hearing before him was legally an equivalent of a determination of the fact in formal proceedings be
*213
fore the Register and Receiver under Circular No. 460. We agree that if Secretary Eall had determined as a fact that the land was not then known to be mineral, his order dismissing the proceedings would have had the same legal effect as if it had followed the more formal procedure prescribed by Circular No. 460. For the Secretary is not obliged to employ proceedings in the local land office as the means for making the determination as to the known mineral character. He could himself héar the evidence in the first instance. Nor is he obliged, in so ascertaining the facts, to follow a procedure similar to that prescribed for the local land office. See
Knight
v.
U. S. Land Ass’n,
Secretary Fall’s order is embodied in a letter sent by his direction to the Commissioner' of the General Land Office, which after referring to the proceedings before the Register and Receiver, says:
“ The transferees of the State of California, representatives of the Department of Justice, and of the Navy Department appeared before Secretary Fall on June 8, 1921, and-presented the matter orally, whereupon, after consideration of the law and facts involved, the Secretary verbally directed that the proceedings be dismissed. You are therefore authorized and directed to dismiss the proceedings against the State of California and its transferees in- re said secs. 16 and 36. Notify all parties in interest of the dismissal and close the case upon your records.”
*214 The letter embodying Secretary Fall’s direction to dismiss the proceedings does not state why he did so. The Company argues that the dismissal was an order judicial in its nature; that in form the' order is a judgment on the-merits; that this judgment conclusively implies a finding of the fact that the land was not known to be mineral at the date of the approval of the survey; and that no evidence is admissible to contradict what the order imports. It may be assumed that‘the hearing was conducted in the judicial manner;-that it was what is often called a quasi-judicial proceeding. • But the order of dismissal is not a judgment. 4 Compare Dickson v. Luck Land Co., 242 U. S. 371, 374. It was an administrative act. And, unlike such administrative acts as a patent or the approval of a list of lands pursuant to a duty imposed upon the Secretary, the order of dismissal does not- carry the implication that all determinations essential to the passing of title have been made. Since it does not, there may be inquiry in pais to ascertain whether Secretary Fall actually made such a determination. To that end the occurrences leading up to the entry of the order of dismissal may be examined. Compare Parcher v. Gillen 26 L. D. 34; Harkrader v. Goldstein, 31 L. D. 87.
In the oral argument of counsel for the Company, in this Court, there was perhaps a suggestion that Secretary Fall actually passed upon the known mineral character of the land as of January 26, 1903, when the survey was approved. But no such contention is made in the brief filed here. And when the occurrences which preceded the making- of the order are examined, it becomes clear that Secretary Fall made no determination of the contested issue of *215 fact, which was to be the subject of a hearing before the local' officers if. he deemed the issue material. He rested "his order of dismissal on a supposed rule of law; holding, on the admitted facts, that the actual known mineral character on January 26, 1903, was not of legal significance. In so ruling, he yielded to the argument of counsel for the Standard Oil Company, who insisted that the then known mineral character had become immaterial, because the Governments was estopped, by action taken prior to 1921, from questioning the' Company’s title. The brief filed by counsel with Secretary Fall prior to his granting the hearing; the notice of the proposed hearing before Secretary Fall on June 8, 1921, given by the Department to the Attorney General and the Secretary of the Navy; and the stenographic report of that hearing, establish that this was the only matter considered by Secretary Fall.
. That brief was entitled an “ argument in support of the request that the Secretary of the Interior decide that in view of the previous action of the department and of its regulations in force in January,-1903, the title to said section is vested in the State of California or its grantees.” 5 The notice recited that the Standard Oil Company and the Pan American Oil Company had “ asked to be heard orally in the matter of proposed proceeding by the Government to determine whether or not said section passed to the State of California under its school grant.” The hearing' *216 consisted of an oral statement by counsel for the Company, interrupted from time to time by questions or remarks. The statement was not a recital of evidence in support of the factual assertion that the land was not known to be mineral on January 26,1903. It was an argument in support of the legal proposition that the proceedings should be closed without deciding that issue of fact, because certain rules of law, arising from past action of the Department, as well as controlling equities, estopped the Government from denying that the title had passed. 6 *217 The conclusion that Secretary Fall did not determine the known mineral character of the land on January 26, 1903, is alone consistent with the stipulated facts. 7 .
Most significant among the stipulated facts is the following: “ It was the contention of the transferees from the State, with which contention Assistant Secretary Finney disagreed at the hearing, that it could serve no pur *218 pose to take evidence in the local land office to determine the question whether or not said section or the lands adjacent thereto showed structural and geological conditions indicative in 1903 of the existence of oil on said section under conditions justifying developments therefor for the reason that said questions presented an immaterial question of fact and said question was not argued or discussed at the proceedings held on June 8, 1921, or at any conferences prior thereto between the representatives of the transferees and the Secretary of the Interior or the First Assistant Secretary of the Interior, except as shown in the brief and in the transcript of proceedings.” [The stenographic report of the hearing above referred to.]
Thus, Secretary Fall did not hear evidence or make a determination on the issue of fact as to the known mineral character of the land within the meaning of the decisions in
Diamond Coal Co.
v.
United States,
Where by the terms of an act, the Secretary is required, upon application of the claimant, to issue a patent, as in
Michigan Land & Lumber Co.
v.
Rust,
But here no similar affirmative duty rested upon the Secretary to the performance of which the determination of the question of law was incidental. Secretary Fall owed no active duty to the State or to any other claimant. His duty in respect to the land was solely that owed to the United States — the duty to preserve its interests therein. The inquiry directed to be made in the local land office had been ordered by a predecessor solely in the performance of that duty. If as a result of the inquiry it should be found that the land was known to be mineral, the Government would, if necessary, bring legal proceedings for possession and for damages or an accounting. If it should be found that the land was not known to be mineral, there would be no occasion for any further departmental action. Secretary Fall had, of course, the power to vacate the order of his predecessor that the Régister and Receiver proceed with the investigation. ' For it is within the dis *220 cretion of every Secretary to decide what investigations he shall pursue in the public interest; and no Secretary is obliged to continue an inquiry which he believesi to be futile. But the question here is whether he can by action other than the final determination of fact, preclude resumption of the inquiry in the Department, and thereby vest the title of known mineral land in the State.
'We think that Congress did not confer upon the Secretary of the Interior the power to pass generally upon the right of the State to the land. When the Secretary has the duty to issue a patent or to furnish other evidence of title of a claimant, he must have authority to determine the questions of law incident to the performance of that duty.
Litchfield
v.
Register,
When Secretary Fall undertook to determine, not as a fact whether the land was known to be mineral in 1903, but as a proposition of law that, because of other conceded facts, the Company’s title had become unassailable, he acted without authority; and the order of dismissal based thereon did not remove the land from the jurisdiction of the Department.
Reversed.
Notes
See Joint Hearings before Senate Committee on Public Lands and Surveys and House Committee on Public Lands' on S. 3078 and H. R. 9182, to assure title to granted school lands, February 11 and 12, 1926; Report of Senate Committee No. 603, April 5 [1G] 1926, 69th Congress, First Session; Report of House Committee, No. 1617, December 9, 1926, 69th Congress, Second Session; No. 1761, January 13, 1927, 69th Congress, Second Session; 67 Cong. Record, p. 8424; 68 Cong. Record, pp. 1815, 1820, 2015, 2581. See also Hearings of. Subcommittee, 69th Cong:, First Session, pursuant io S. Res. 347, Vol. 2, pp. 1987-2062.
By reason of subsection (c) of § 1 of the Act of January 25, 1927, 44 Stat. 1026, the proceedings here involved are not affected by that Act. See 52 L. D. 51-54,
This action was taken after a joint resolution of Congress, dated February 21, 1924, 43 Stat. 15. It is conceded that this fact has no legal significance in the case. The basis on which Secretary Work proceeded is shown in his decision reported in 51 L. D. 141.
The Department has repeatedly ruled that its decisions are not to be controlled by the same strict doctrine of res judicata which obtains „as to judgments of the courts. Osborn v. Knight, 23 L. D. 216, 218; Joseph Pretzel, 24 L. D. 64, 65; Ernest B. Gates, 41 L. D. 384. Compare Howard A. Robinson, 43 L. D. 221.
The brief states: “There is no reason why this decision as to the title of the State should not be made now without putting the State to the enormous and costly burden of proof, such as was in issue in the Elk Hills case.
[United States
v.
Southern Pacific Company,
The prior action relied upon as vesting title in the State and its transferees was: (1) The fact that the land was classified as non-mineral in 1904, when, upon receipt of a report from Special Agent Ryan that it was non-mineral, it was relieved from suspension; (2) the fact that, on March 6, 1903, the Department adopted an administrative rule respecting school land grants that the State would not be permitted to make lieu selections based on the alleged mineral character of land within a school section, unless it proved that there had been actual discovery or exposure of mineral thereon. Mr. Sutro argued that since under this rule the State could not have made the land the base for a lieu selection, it was legally entitled to retain it; and having acted on the rule, its transferees were unaffected by later decisions of this Court
(Diamond Coal Co.
v.
United States,
“And I submit that in this case, where there is no fraud, no possible allegation of fraud, where the State, five years after the classification of this land, sold it in good faith to people who bought it in good faith, and who held it for 10 years, and who have now invested some millions of dollars in the land, that the time has passed when the United States can assert its title thereto, and that the United States is estopped by the judgment of this department that this was 'non-mineral land in 1904, and by its own regulations, which defined it as nonmineral land in 1903. Now if you will ask me what it is I am asking you to do, I will say it is this: I am asking the department to cldse this case on the ground that the title is in the State, and there is nothing further to investigate.” Secretary Fall then said: “What you are asking now is that if convinced that the rule is as you state it, that instead of allowing this case to go to a hearing, and then in event I would hold with you, so deciding at that time, that if I am *217 witli you that I should decide it at this time and prevent the delay in the trial? ” After some further discussion, Secretary Fall asked: “ Is Mr. Sutro’s statement of the ease practically admitted?” First Assistant Secretary Finney answered: “I think that is substantially the case.” Whereupon the Secretary said: “The contest will be dismissed.”
The land lies within Naval Petroleum Reserve No. 1; a part of it is immediately adjacent to that involved in
United States
v.
Southern Pacific Company,
