United States. Department of the Treasury. "Our Present Prolonged War - Tariff Taxes," in United States. Department of the Treasury. "Annual Report of the Secretary of the Treasury on the State of the Finances for the Year 1886, Volume I: Finance," Annual Report of the Secretary of the Treasury on the State of the Finances (1886) : 49-50. https://fraser.stlouisfed.org/title/194/item/5532/toc/339706 , accessed on April 24, 2024.