Nathan Clifford, Waring v. The Mayor — Opinion of the Court
“ Sales by the importer are held to be exempt from State taxation because the importer purchases, by the payment of the duty, a right to dispose of the merchandise as well as to bring it into the country, and because the tax, if it were held to be valid, would intercept the import, as an import, in the way to become incorporated with the general mass of property, and would deny it the privilege of becoming so incorporated until it should have contributed to the revenue of the State. ”
