Hamlin, Charles S. (Charles Sumner), 1861-1938 and Federal Reserve Board, 1914-1935 "Address before the Roxbury Historical Society : Outline." April 17, 1917, https://fraser.stlouisfed.org/title/443/item/7610/content/pdf/hamlin_19170417_mss24661_356_013, accessed on April 25, 2024.