Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. Confidential Letter From the Governor re Cooperation with the Secret Service in Matter of Raised Notes and Counterfeits, Number X-1730, Volume 11, Page 894, Mimeograph Letters and Statements of the Board. Board of Governors of the Federal Reserve System (U.S.), 1935-. https://fraser.stlouisfed.org/archival/4957/item/512604, accessed on May 10, 2026.