United States. Department of the Treasury. "Report of the Chief of the Division of Special Agents," 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) : 978-979. https://fraser.stlouisfed.org/title/194/item/5532/toc/339682 , accessed on April 28, 2024.