United States. Department of the Treasury. "Report of the First Comptroller of the Treasury," in United States. Department of the Treasury. "Report of the Secretary of the Treasury on the State of the Finances for the Year 1869," Annual Report of the Secretary of the Treasury on the State of the Finances (1869) : 93-96. https://fraser.stlouisfed.org/title/194/item/5513/toc/367680 , accessed on March 28, 2024.