Record Group 104, Records of the New Orleans LA Branch Mint and Assay Office, 1840-1942. Record of Department Letters Received, Oct. 2, 1897-May 31, 1911. National Archives ID 2579588, https://catalog.archives.gov/id/2579588.
Note: this is an index to letters received, not actual letter contents.
"Annual Report of the Secretary of the Treasury on the State of the Finances for the Year 1896", dated 1897, and labeled Document No. 8, 54th Congress, 2nd Session.
