Per Curiam,

This was an action of forcible entry and detainer, commenced before a justice of the peace, and brought by appeal into the District Court of Dubuque cvanty, The case was submitted to that court on an agreed statement of facts, which although affording but an imperfect view of the whole matter, must constitute the only ground for a decision here.

It is admitted that the locus in quo, was public land belonging to the United States, and that the defendants entered under, and by virtue of a lease from the agent of the United States lead mines ; but the plaintiff’s ground of action is not set forth ; nor whether they or any one else, were in possession of the lands at the time the aforesaid lease was executed. By mutual consent, the whole case is to turn upon one point; the power of the President of the United States to authorize the granting of leases of this nature, for any or all lead mines on the west side of the Mississippi river.

It was contended in the course of the argument, that the plaintiffs below in this case, were themselves sheer trespassers, and much stress seemed to be laid on that circumstance. That fact however, is in no manner mingled with this case. The action it not ejectment, but forcible entry and detainer, and may be brought by a trespasser, even against the legal owner of the premises. Ail that is necessary to sustain this action is that the defendant should forcibly and illegally have-turned the plaintiff out of possession.

Besides, the stipulations in the argument, make the whole to depend upon the right of the agent to lease, and we cannot travel beyond that agreement. Nothing is therein mentioned of the plaintiffs’ being'trespassers. We have therefore no data by which to ascertain the title of *255the plaintiffs, nor if we had, would that be a proper subject of considera-» tion in this form of action.

It has been urged, that the President is vested with the power in question, in consequence of the general supervision of the public lands, with which he is by law entrusted. Such a power however, should have a more substantial basis. It is not a branch of prerogative. It should not result from implication. The right to lease the lead mines would imply a like power in relation to all the other lands of the territory. It a lease for three years can be legally given, independent of statutory authority, why not for fifty ? And if the President can grant such leases, Congress itself, can afterwards only dispose of the reversion. Whole States might thus have been peopled by a race of tenantry, holding, not under the government, but under the executive.

Probably, from such views ot the case, serious doubts have sometimes been entertained, whether even Congress possesses the legitimate power to authorize such leases. The Supreme Court of the United States have recently set this question at rest. United States vs. Gratiot, et al. 14, Peters, 526.

We feel no disposition to rebel against that decision. We think however, that in such cases, the constitutional powers of Congress is exerted to its utmost tension, and that under such circumstances, no power of this nature can exist independent of an unequivocal statute. None should result from inference, or be obtained by loose construction. If Congress either directly, or by a fair and reasonable construction of any statute, have authorized the leasing of the lead mines in the manner persued by the agent at Dubuque, the decision of the District Court must be reversed ; otherwise not.

What authority then has been conferred by statute, to justify such leasing ? None has been pointed out, except that derived from two acts of Congress, both passed March 3d, 1807. One of these entitled "An act making provision for the disposal of the public lands, situated between the United States military tract, and the Connecticut reserve, and for other purposes,” authorizes the President to lease for a term not exceeding five years, any lead mine, which has been, or may hereafter be discovered in the Indian territory. This act, so far from giving the authority contended for, raises a strong inference against it, agreeably to the maxim “ inclusio unius est exclusio alleriusS’*

The express power given to lease in the Indian territory, is local, and *256inferentially withholds the like power to lease elsewhere. It also goes far to overthrow the position assumed in the argument, that the law having intrusted the President with a general supervision of the public domain, he possessed the power to lease the lead mines, in the absence of any express statute on the subject. If the executive was already vested with a general power of this nature, why should it be again conferred upon him in a particular case. By the passage of the act referred to, we have at least a legislative exposition of the law on this subject, independent of statute.

But reliance is chiefly placed upon the other statute referred to, bearing even date with the above mentioned. It is entitled “ an act to prevent settlements being made on lands ceded to the United States, until authorized by law/’ The first section of that act, prescribes certain penalties and forfeitures, and in case of unauthorized settlements upon the public lands. The President is also empowered to direct the Marshal to remove intruders and also to take such other measures, and to employ such military force as he may judge necessary and proper to effect such removal. It is contended that in as much as the President is hereby authorized “ to take such other measures ” as he may judge necessary and proper, to remove intruders, he may make a lease for that purpose; that instead of ordering out the military force, he may lease the ground to some other citizen, and then leave the latter to remove the intruder by legal and peaceable means.

Such would be a most liberal construction of the statute, under any circumstances; but the reasoning would be much more plausible were it not for the absence of one essential fact. There is nothing to show that the lease in the present case, was given for any such purpose. It does not appear from the agreed statement of facts, that any person was upon the land when the lease was made to the defendants below. Admitting that the President would be authorized to employ this “ measure” to remove a trespasser, could he anticipate the trespass, and lease the lands to prevent intrusion 1 Under the general authority to select his own measures to remove intruders, can he dispose of the whole public domain for an unlimited space of time, before yet a single intruder has set foot upon it ? The proposition carries its own refutation ; and yet if the position taken by the counsel for the defendants be tenable, we shall be irresistably driven to this sweeping conclusion.

The only remaining argument that we recollect to have heard urged for the plaintiffs in error, (though as we find no brief among the papers of the case, we may have forgotten some points,) is derived from the *257power to lease, contained in the second section of the last mentioned statute. That section commences with a provision in favor of those who had settled on the public lands prior to that date—authorizing them to remain, upon making application to the proper land officer and com. plying with ce'-'ain conditions therein prescribed, and concludes with the following proviso: “ that in all cases where the tract of land applied for, includes either a lead mine, or salt spring, no permission to work the same shiil be granted, without the approbation of the President of the United States, who is hereby authorized to cause such mines or springs to be leased for a term not exceeding three years, and on such conditions as he shall think proper.'’ It is insisted on the one hand, that this proviso contains a general authority to lease mines and salt springs. This cannot be the proper construction of the statute. The authority herein contained must be explained by the context, the proviso by the subject matter of the section. That section relates entirely to the case of persons who were then upon the public lands—allows them to remain upon complying with certain requisites, unless the tract embraces a lead mine, or a salt spring; in which case, the approbation of the president is made netessary. Then comes the clause under consideration authorizing the President to lease “such mines and salt springs” for the term of three years. What mines and salt spring are here refered to ? Clearly those located on tracts then occupied, and to the further occupancy of which the approbation of the President is made requisite.

This view of the matter is confirmed by the passage of the other statute already refered to. If the proviso we have been considering, was intended to confer a general power of leasing all lead mines and salt springs, could there be any necessity for other statute, giving the special power to lease in the Indian territory. These two acts were passed not only by the same Congress, but on the same day, and there is therefore the strongest necessity for giving them such a construction as to give effect to both. This will be best accomplished by regarding the one as local, and the other as applicable to all lands then occupied. The case at bar cannot be placed in a predicament to be affected by either of these statutes. We therefore conclude that there is no law to authorize the leasing of the lead mines within this territory.

Judgment below affirmed.