United States. Department of the Treasury. "Report of Superintendent of the Coast Survey," in United States. Department of the Treasury. "Report of the Secretary of the Treasury on the State of the Finances for the Year 1865," Annual Report of the Secretary of the Treasury on the State of the Finances (1865) : 207-209. https://fraser.stlouisfed.org/title/194/item/5509/toc/302218 , accessed on May 12, 2024.