Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. Letter From Governor, May 9, 1918, to Govs., Federal Reserve Banks, re Letter From Chief Inspector, Post Office Dept., Calling Attention to Advisability of Banks Keeping Record of Serial Numbers of Bills Shipped Through the Mails, for Use in Case of Loss, Number X-935, Volume 7, Page 529, 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/512027, accessed on March 10, 2026.