The system of specific duties already prevails in Mexico, and may be put by us into immediate operation; and if, as conceded, specific duties should be more burdensome upon the people of Mexico, the more onerous the operation of these duties upon them the sooner it is likely that they will force their military rulers to agree to a peace. It is certain that a mild and forbearing system of warfare, collecting no duties in their ports in our possession on the Gulf and levying no contributions, whilst our armies purchase supplies from them at high prices, by rendering the war a benefit to the people of Mexico rather than an injury has not hastened the conclusion of a peace. It may be, however, that specific duties, onerous as they are, and heavy contributions, accompanied by a vigorous prosecution of the war, may more speedily insure that peace which we have failed to obtain from magnanimous forbearance, from brilliant victories, or from proffered negotiation. The duties, however, whilst they may be specific, and therefore more onerous than _ad valorem_ duties, should not be so high as to defeat revenue. It is impossible to adopt as a basis the tariff of Mexico, because the duties are extravagantly high, defeating importation, commerce, and revenue and producing innumerable frauds and smuggling. There are also sixty articles the importation of which into Mexico is strictly prohibited by their tariff, embracing most of the necessaries of life and far the greater portion of our products and fabrics.