Excerpt from "Executive Documents, 20 Session, 41st Congress", subtitled "Nos. 257 to 307, 1869-70". Titled "Letter from the Secretary of the Treasury: Mints, Assay Offices, and Coinage", and dated June 29, 1870.
U.S. National Archives (Record Group 104, Entry 1, General Correspondence)
La description:
Philadelphia Mint records scanned at the National Archives (NARA) in Philadelphia - covering the period January, 1870 - December, 1870. General Correspondence from Entry 1, Box 87 of Record Group 104. Courtesy of John Graffeo.