U.S. National Archives (Record Group 104 [Denver], Entry 18, Expense Register, 1863 - 1887)
Expense Register, 1863 - 1887
National Archives online catalog entry is https://catalog.archives.gov/id/2635575. See also the National Archives & Records Administration numismatic finding aids at https://nnp.wustl.edu/library/archivedetail/538870.
Scanned at the National Archives in Denver, courtesy of John Graffeo.