Isaac N. QuinnDemocratic
Died: June 26, 1865 in San Rafael, CA
1860: President pro Tempore, California State Senate (for 17 days; succeeded by Charles J. Lansing)
1860-1861: Acting Lieutenant Governor (following succession of John G. Downey to Governor)
1861: Resigned as Lieutenant Governor on January 7.
Source: History of Political Conventions in California, 1849-1892 by Winfield J. Davis (1893)