And this improvement,--how was it to be accomplished, and who was to accomplish it? We were ten or twelve millions of people, spread over almost half a world. We were more than twenty States, some stretching along the same seaboard, some along the same line of inland frontier, and others on opposite banks of the same vast rivers. Two considerations at once presented themselves with great force, in looking at this state of things. One was, that that great branch of improvement which consisted in furnishing new facilities of intercourse necessarily ran into different States in every leading instance, and would benefit the citizens of all such States. No one State, therefore, in such cases, would assume the whole expense, nor was the co-operation of several States to be expected. Take the instance of the Delaware breakwater. It will cost several millions of money. Would Pennsylvania alone ever have constructed it? Certainly never, while this Union lasts, because it is not for her sole benefit. Would Pennsylvania, New Jersey, and Delaware have united to accomplish it at their joint expense? Certainly not, for the same reason. It could not be done, therefore, but by the general government. The same may be said of the large inland undertakings, except that, in them, government, instead of bearing the whole expense, co-operates with others who bear a part. The other consideration is, that the United States have the means. They enjoy the revenues derived from commerce, and the States have no abundant and easy sources of public income. The custom-houses fill the general treasury, while the States have scanty resources, except by resort to heavy direct taxes.