Having mentioned the ports in which it is most probable the enemy would attempt to make an impression, calculations can be made for a like mode of defending other situations--a _minutiae_, which I am not prepared to enter into, nor is it necessary in the present state of this disquisition. I have shewn a strong power, in boats and Torpedoes, to defend six of our principal ports. Gentlemen will please to look to the numbers allotted to each port, and reflect, whether an enemy would not be inclined to respect a force so active and tremendous in its consequences; a force, which under the cover of the night, could follow them into every position within our waters, and pursue them for some leagues from our shores into the open sea; yet those establishments would not require an expenditure of four hundred thousand dollars; for the cutlasses and fire-arms to arm the boats, and the powder for the Torpedoes, are already in our arsenals and magazines. And what is four hundred thousand dollars in a national point of view? A sum, which would little more than build and fit out for sea two ships of 30 guns. After reflecting on these experiments and demonstrations, I hope no one will, for a moment, hesitate in deciding, that the two thousand, seven hundred Torpedoes and six hundred and fifty boats, before estimated, will be a better protection for six of our sea-ports, than two ships of thirty or any other number of guns. To man the boats in the different ports, nothing more will be necessary than a marine militia; they can be as numerous as any possible necessity could require; and should be exercised to row and use the Torpedoes until the practice became familiar; after which practice, once a month would be sufficient. Corps thus formed, would be no expence to the national government; Torpedoes would require no repairs, and the boats, carefully laid up in houses built for the purpose, would last many years. To compare Torpedoes with the usual marine establishments, and the superior protection which they give, for any specific sum expended, I have stated this prospect of economy; but I do not consider economy, in the commencement of such a system, as an object of primary importance. Let our fellow-citizens be convinced. Convince the people of Europe of the power and simple practice of these engines, and it will open to us a sublime view of immense economy in blood and treasure. As we are not in actual hostility, and have no opportunity to try experiments on an enemy, my opinion is, that we should immediately prepare for such an event; and to satisfy the public, we should, without loss of time, make the following experiment: