The stated total for Gunn is 16,398 but the county figures add up to 16,498.
James Mandeville never assumed office due to his appointment as United States Surveyor General for the District of California. Aaron Meloney was appointed as Controller on April 27, 1858 and a special election was scheduled for September 1858 to fill the remainder of the term.
Candidates' party affiliations obtained from the 9/19/1857 Placer Herald (of Auburn). https://www.cdnc.ucr.edu/?a=d&d=PH18570919.2.2&srpos=38&e=-------en--20--1--txt-txIN--------
Source for Popular Vote data: California State Archives, "For State Controller," Statement of the Votes Polled in the State of California, on the Second Day of September, A.D. 1857 (Sacramento, 1857)