If, on the contrary, there be but one government pervading all the States, there will be, as to the principal part of our commerce, but ONE SIDE to guard--the ATLANTIC COAST. Vessels arriving directly from foreign countries, laden with valuable cargoes, would rarely choose to hazard themselves to the complicated and critical perils which would attend attempts to unlade prior to their coming into port. They would have to dread both the dangers of the coast, and of detection, as well after as before their arrival at the places of their final destination. An ordinary degree of vigilance would be competent to the prevention of any material infractions upon the rights of the revenue. A few armed vessels, judiciously stationed at the entrances of our ports, might at a small expense be made useful sentinels of the laws. And the government having the same interest to provide against violations everywhere, the co-operation of its measures in each State would have a powerful tendency to render them effectual. Here also we should preserve by Union, an advantage which nature holds out to us, and which would be relinquished by separation. The United States lie at a great distance from Europe, and at a considerable distance from all other places with which they would have extensive connections of foreign trade. The passage from them to us, in a few hours, or in a single night, as between the coasts of France and Britain, and of other neighboring nations, would be impracticable. This is a prodigious security against a direct contraband with foreign countries; but a circuitous contraband to one State, through the medium of another, would be both easy and safe. The difference between a direct importation from abroad, and an indirect importation through the channel of a neighboring State, in small parcels, according to time and opportunity, with the additional facilities of inland communication, must be palpable to every man of discernment.