The state legislature's canvass did not include the votes from El Dorado, Klamath, and San Bernardino counties. The Journal of the Assembly gives the totals as 49,096 for Weller, 19,621 for Stanly, and 17,723 for Bowie.
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 Governor," Statement of the Votes Polled in the State of California, on the Second Day of September, A.D. 1857 (Sacramento, 1857)