Passing the various objections made to the maintenance of this suit on account of an alleged defect of parties, and also in regard to the character in which the complainant sues, merely that of a citizen and taxpayer of the United States and a resident of the District of Columbia, we come to the main question as to the validity of the agreement between the Commissioners of the District and the directors of the hospital, founded upon the appropriation contained in the act of Congress, the contention being that the agreement if carried out would result in an appropriation by Congress of money to a religious society, thereby violating the constitutional provision which forbids Congress from passing any law respecting an establishment of religion. Art. I of the Amendments to Constitution.

In the brief of counsel for plaintiff in error many presumed errors are elaborately discussed, all of which when analyzed rest on the assumption that there was a right in the plaintiff in error to use the common of the city of Boston free from legislative or municipal control or regulation. It is argued that —"Boston Common is the property of the inhabitants of the city of Boston, and dedicated to the use of the people of that city and the public in many ways, and the preaching of the gospel there has been, from time immemorial to a recent period, one of these ways. For the making of this ordinance in 1862 and its enforcement against preaching since 1885, no reason whatever has been or can be shown."The record, however, contains no evidence showing the manner in which the ordinance in question had been previously enforced, nor does it include any proof whatever as to the nature of the ownership in the common from which it can be deduced that the plaintiff in error had any particular right to use the common apart from the general enjoyment which he was entitled, as a citizen, to avail of along with others and to the extent only which the law permitted. On the contrary, the legislative act and the ordinance passed in pursuance thereof, previously set out in the statement of facts, show an assumption by the State of control over the common in question. Indeed, the Supreme Judicial Court, in affirming the conviction, placed its conclusion upon the express ground that the common was absolutely under the control of the legislature, which, in the exercise of its *47 discretion, could limit the use to the extent deemed by it advisable, and could and did delegate to the municipality the power to assert such authority. The court said:"There is no evidence before us to show that the power of the legislature over the common is less than its power over any other park dedicated to the use of the public or over public streets the legal title to which is in a city or town. Lincoln v. Boston, 148 Mass. 578, 580. As representative of the public it may and does exercise control over the use which the public may make of such places, and it may and does delegate more or less of such control to the city or town immediately concerned. For the legislature absolutely or conditionally to forbid public speaking in a highway or public park is no more an infringement of the rights of a member of the public than for the owner of a private house to forbid it in his house. When no proprietary right interferes the legislature may end the right of the public to enter upon the public place by putting an end to the dedication to public uses. So it may take the less step of limiting the public use to certain purposes. See Dillon Mun. Corp. secs. 393, 407, 651, 656, 666; Brooklyn Park Commissioners v. Armstrong, 45 N.Y. 234, 243, 244.

We pass without extended discussion the suggestion that the particular section of the statute of Massachusetts now in question (§ 137, c. 75) is in derogation of rights secured by the Preamble of the Constitution of the United States. Although that Preamble indicates the general purposes for which the people ordained and established the Constitution, it has never been regarded as the source of any substantive power conferred on the Government of the United States or on any of its Departments. Such powers embrace only those expressly granted in the body of the Constitution and such as may be implied from those so granted. Although, therefore, one of the declared objects of the Constitution was to secure the blessings of liberty to all under the sovereign jurisdiction and authority of the United States, no power can be exerted to that end by the United States unless, apart from the Preamble, it be found in some express delegation of power or in some power to be properly implied therefrom. 1 Story's Const. § 462.

This appeal was taken directly to this court on the ground that the case involved the construction or application of the Constitution of the United States, and that the constitutionality of a law of the United States was drawn in question; and although it may be, as argued by the Government, that the principles which must control our decision have been practically settled, we think, the whole record considered, that we are not constrained to dismiss the appeal for that reason.