United States. Department of the Treasury. "Annual Report of the Board of Supervising Inspectors of Steamboats," in United States. Department of the Treasury. "Report of the Secretary of the Treasury on the State of the Finances for the Year 1867," Annual Report of the Secretary of the Treasury on the State of the Finances (1867) : 359-390. https://fraser.stlouisfed.org/title/194/item/5511/toc/329416 , accessed on April 19, 2024.