United States. Department of the Treasury. "Report of the Secretary of the Interior [Census Returns]," in United States. Department of the Treasury. "Report of the Secretary of the Treasury on the State of the Finances [for the Fiscal Year Ending June 30, 1851]," Annual Report of the Secretary of the Treasury on the State of the Finances (1851) : 315-316. https://fraser.stlouisfed.org/title/194/item/5497/toc/413371 , accessed on April 23, 2024.