United States. Department of the Treasury. "Report of the Secretary of the Treasury, on the Finances, Containing Estimates of the Public Revenue and Public Expenditures, and Plans for Improving and Increasing the Revenue," Annual Report of the Secretary of the Treasury on the State of the Finances (July 4, 1861). https://fraser.stlouisfed.org/title/194/item/5505, accessed on September 17, 2024.