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.
"Document No. 271: House of Representatives: Letter from the Secretary of the Treasury, Inclosing draft of proposed legislation in relation to the Philadelphia Mint.", 54th Congress, 2nd Session.
