United States. Department of the Treasury. "Effect on Coinage, of Legal Tender Function," in United States. Department of the Treasury. "Annual Report of the Secretary of the Treasury on the State of the Finances for the Year 1886, Volume I: Finance," Annual Report of the Secretary of the Treasury on the State of the Finances (1886) : 29-30. https://fraser.stlouisfed.org/title/194/item/5532/toc/339692 , accessed on March 28, 2024.