United States. Department of the Treasury. "Report of the Commissioner of Customs," in United States. Department of the Treasury. "Report of the Secretary of the Treasury on the State of the Finances for the Year Ending June 30, 1861," Annual Report of the Secretary of the Treasury on the State of the Finances (1861) : 202-203. https://fraser.stlouisfed.org/title/194/item/5446/toc/161302 , accessed on March 30, 2024.