U.S. National Archives & Records Administration (NARA), record group 104 (U.S. Mint), entry 96 (bullion ledgers). Scanned under the direction of Robert W. Julian at the NARA Philadelphia facility, operating via a grant from the Central States Numismatic Society. Note, for correspondence, endorsements were generally not copied.

Note: volume numbering for this series is unclear and is pending clarification.