the insidious advances which it is ever ready to make upon the checks that are designed to restrain its action. But I do not entertain such gloomy apprehensions. If it be the wish of the people that the construction of roads and canals should be conducted by the Federal Government, it is not only highly expedient, but indispensably necessary, that a previous amendment of the Constitution, delegating the necessary power and defining and restricting its exercise with reference to the sovereignty of the States, should be made. Without it nothing extensively useful can be effected. The right to exercise as much jurisdiction as is necessary to preserve the works and to raise funds by the collection of tolls to keep them in repair can not be dispensed with. The Cumberland road should be an instructive admonition of the consequences of acting without this right. Year after year contests are witnessed, growing out of efforts to obtain the necessary appropriations for completing and repairing this useful work. Whilst one Congress may claim and exercise the power, a succeeding one may deny it; and this fluctuation of opinion must be unavoidably fatal to any scheme which from its extent would promote the interests and elevate the character of the country. The experience of the past has shown that the opinion of Congress is subject to such fluctuations. If it be the desire of the people that the agency of the Federal Government should be confined to the appropriation of money in aid of such undertakings, in virtue of State authorities, then the occasion, the manner, and the extent of the appropriations should be made the subject of constitutional regulation. This is the more necessary in order that they may be equitable among the several States, promote harmony between different sections of the Union and their representatives, preserve other parts of the Constitution from being undermined by the exercise of doubtful powers or the too great extension of those which are not so, and protect the whole subject against the deleterious influence of combinations to carry by concert measures which, considered by themselves, might meet but little countenance.