U.S. National Archives (Record Group 104, Entry 217, Letters Received from the Director of the Mint, 1858-1873) Pubblico Deposited
Letters received from the Director of the Mint, 1858-1873.
The National Archives catalog entry is https://catalog.archives.gov/id/7064808. See also the National Archives & Records Administration numismatic finding aids at https://nnp.wustl.edu/library/archivedetail/538870.
Newman Portal acknowledges Roger W. Burdette for sharing documents in this NARA entry.