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not to impose any new or additional duty on the tonnage of British ships or vessels, or to increase the then subsisting difference between the duties payable on the importation of any article in British American ships; so that when Congress imposed increased duties, the English Parliament exercised the reserved right stipulated in the treaty, and thus by the Act of Geo. III., c. 97, countervailing duties were imposed, payable on the importation of American goods in American vessels, in addition to the duties payable on their importation in British ships. Additional duties were also imposed upon certain specified articles, and three per cent. ad valorem upon enumerated articles.

Such, then, was the legislation on both sides, as it most materially affected merchant shipping. The American shipowners and merchants looked upon every proceeding on the part of the British Legislature as levelled especially against themselves; and, jealous of everything which militated against their own interest, they contended that the Parliament of