The complaint states that the defendant is indebted to the plaintiffs for the wharfage of the defendant, at the wharf of the plaintiffs, in the City of San Francisco, in a certain sum, and that sum is, by law, payable in gold coin.

The defendant’s counsel presents the point that the statute under which the action is brought (Sec. 2 of Water Front Act of 1864, Stats. 1863-4, p. 139) is unconstitutional. The ground taken is that this is a case of admiralty and maritime jurisdiction, and that “ as the Judiciary Act of 1789, passed in pursuance of section two of Article IH of the Constitution of the Hnited States, provides that the District *679 Courts * * * shall have exclusive original cognizance of all civil cases of admiralty and maritime jurisdiction,” etc., the Legislature of this Sta+e was without power to confer upon its own Courts jurisdiction of such cases. Before this point can be reached, it must be determined that this is a case of admiralty and maritime jurisdiction. It is said by Mr. Conkling (1 Conkling on Adm. 19) that “ the admiralty jurisdiction, in cases of contract, depends primarily upon the nature of the contract, and is limited to contracts, claims and service purely maritime, and touching rights and duties appertaining to commerce and navigation.” (See Be Lovio v. Boit, 2 Gall. 398 ; The Thomas Jefferson, 10 Wheat. 428; and other cases cited.) A cause of action, to be cognizable in admiralty, whether arising out of a contract, claim, service or obligation, or liability of any kind, must relate to the business of commerce and navigation.

The defendant’s counsel, in stating the facts of the ease, says that “ the action is brought to recover wharfage while the steamer was engaged in navigating the high seas, and conveying passengers and freight to and from this port and ports in Central America.” But it does not appear from the complaint that the steamer was engaged in commerce and navigation. This fact, or one of similar import, must be stated in the pleadings, in order to make a case falling within the admiralty and maritime jurisdiction. The Court cannot take judicial notice that a vessel found at a wharf is engaged in navigating the high seas, or the navigable inland waters of the State, or is employed in trade, commerce or navigation, of any sort or in any manner. That is a fact of jurisdictional consequence, and must be expressly alleged or be necessarily inferable from the other facts alleged. The precedents of libels in admiralty, although “ there is no special custom extant ” with respect to their form, state this fact, and it is very generally found in all the reported cases. This fact not appearing in the case, the question presented by the defendant’s counsel does not arise.

It is objected that the Harbor Commissioners have no *680 authority to institute actions in rem in the name of the People. Section two of the Act of 1868-4 provides that “ the said Commissioners are hereby authorized and empowered, in the name of the People of the State of California, to institute actions at law and in equity for the possession of any wharf * * * or for the recovery of the tolls, dock-age, rents and wharfage thereof.” The words are comprehensive enough to include all the remedies that a private person could have under the same circumstances, and there are no words in the Act, and nothing in the nature of the cause of action, indicative of a restriction to certain remedies to the exclusion of others provided by law. We see no ground for holding that the Commissioners are not entitled to avail themselves of the remedy against the steamer provided by section three hundred and seventeen of the Practice Act. The proceeding is similar to that adopted in The Hine v. Trevor, 4 Wal. 555, which, it was said, was “ a remedy partaking of all the essential features of an admiralty proceeding in rem.” In that case one question was, whether the remedy adopted was one falling within the clause of the ninth section of the Judiciary Act of 1789, which “saves to suitors in all cases the right of a common law remedy.” It was not held that the form of the remedy adopted -would make a case within the admiralty jurisdiction; but the Court having determined, from the facts of the case, that it was one of admiralty cognizance, considered that the remedy was not within the saving clause of that section. In cases not within the jurisdiction of the admiralty Courts, there can be no question that the Legislature may devise or adopt any form of remedy. Had the plaintiffs desired a decision on the jurisdictional questions presented on the part of the defendant, the fact that the steamer was. engaged in commerce and navigation, as stated in the brief for the defendant, would have been admitted by the plaintiffs; and had that fact appeared in the case or been admitted by counsel, there would have been no difficulty in determining whether the case was within the authority of The Hine v. Trevor. To *681 avoid misapprehension, we add that if the fact in question would bring a case instituted by a private person within the admiralty jurisdiction, it would not necessarily follow that the same result would ensue when the State is plaintiff and the cause of action is of the nature of the one before us, as explained in the next point.

The third point is, that the Court erred in ordering judgment in gold coin. It is provided by section eleven of the Water Front Act that “All tolls, dockage and wharfage charges, by this Act authorized and required to be collected, shall be due and collectable exclusively in gold and silver money of the United States.”

The case does not fall within the provisions of the Specific Contract Act, as there was no contract in writing for the payment of the wharfage. The several sums required to be paid for dockage, wharfage, etc., are in the nature of public revenue. The funds are raised and appropriated by the Glovernment for the purpose of constructing wharves and other works for the protection and improvement of the harbor of San Francisco, and to aid and facilitate commercial intercourse between this and other ports. The enterprise was •set on foot for public benefit, and is one in which the public are interested, and was undertaken and carried on by the State in her sovereign capacity, and not as a mere private proprietor. The tolls, dockage and wharfage charges provided for in that section, are levied under the same authority as license, poll and ad valorem taxes, and, in our opinion, they are charges upon the property, to raise money for public purposes, within the principles laid down in Perry v. Washburn, 20 Cal. 350 .

The liability for the payment of such charges does not arise out of contract, or, if so in any manner, only in the remote degree that it does in case of license taxes. They are dues to the public treasury, and, as such, it was competent to the Legislature to make them payable in coin, or *682 legal tender notes, or in money generally. (See State Treasurer v. Collector of Sangamon County, 28 Ill. 509 .)

Judgment affirmed.