The Board of Commissioners had power to establish the plaintiff’s ferry, if the two were necessary for the public accommodation, and of that necessity they are the final judges.

We are, therefore, to inquire whether the plaintiff has a valid license; for if not, the acts of the defendant are not injurious to him.

The bill states, and the answer admits, that the commissioners granted to the plaintiff a license to keep a ferry at, &c., for the term of one year.

If this order, merely directing a license to issue, and neither preceded nor accompanied by an order establishing the ferry, can, by extreme liberality of construction, be taken to import an establishment of the ferry, still it is an order establishing a temporary ferry for a single year. The statute requires the commissioners, when they deem a ferry necessary, “ to establish and confirm the same by an especial order,” and then to direct their clerk to issue to the proprietor a license to keep the same. They are also required to fix the rates of toll “ from time to time.” Such ferries are subject to an annual tax, and when any ferry is not kept as required by the act, they may summon the proprietor and revoke his license. This contem*41plates that the ferry is to he permanent, and the right to keep it as durable at least as the life of the license, unless sooner revoked. And this is important to the public as a means of securing safe, commodious and expeditious passage at low rates of toll. Oppressive tolls would be necessary, if the entire investment must he re-imbursed, with a profit, in a single year. Good ferries and cheap tolls ean only be secured by making them a safe and permanent investment, as the statute contemplates.

As there can be no temporary ferry, this order cannot take effect according to its terms.

It must be construed to vest a permanent franchise contrary to the expressed intent, or be treated as merely void.

When a public body or tribunal exercises an inherent power, which, by its very nature, necessarily pertains to such body or tribunal, the act is valid, though not done in the mode directed. Thus, if a court, having inherent power tc> decide a cause, or a legislature, having inherent power to enact a law, proceeds in a different mode from that prescribed, the decision or law, though it may be erroneous; and in case any other tribunal, body or person possess the power of review, may be corrected or reversed, is, unless and until set aside by a direct proceeding instituted for that express purpose, valid and binding on all persons and things affeeted by it. But when such public body or tribunal attempts to exeeute a power not inherent, but specially given by a statute or other instrument, authorizing it to do a particular thing in a particular way, then the power to do the thing is inseparably connected with the mode of doing it, and any attempt to do it otherwise, or to do less or more than what is authorized, is not an exercise of that special power, but an idle and void act. (Voorhees v. The U. S. Bank, 10 Peters, 449.)

The power to establish ferries appertains to the legislature, and not to the commissioners. To the latter-it has been delegated by statute to a limited extent. They are authorized to create that particular class or kind of ferry franchises which was thought to be, as a general rule, most advantageous to *42the community. If any other is to be created, it must be done by the legislature directly, or by delegation of further power. An attempt on the part of the commissioners to create a different one, either in respect to duration or otherwise, is not an exercise of the power conferred, but an usurpation of further power. And for the court to say that the franchise, as intended, shall be construed into one that was not intended, would be to amend a defective thing by legislation, and not to ascertain what it really is by adjudication. "We must, therefore, hold it void.

And, being void, the plaintiff has no title, and the injunction must be dissolved.