Monetary Commission : Miscellany, Reel 58, Box 84, Folder 7
Monetary Commission : Miscellany, Reel 58, Box 84, Folder 7, Nelson W. Aldrich Papers. Library of Congress. Manuscript Division. https://fraser.stlouisfed.org/scribd/?item_id=500297&filepath=/files/docs/historical/aldrich/058_084_07.pdf&start_page=1, accessed on August 22, 2017.
Various documents, including Treasury data and "United States Currency Revision" by Marshall R. Geding.