John C. Fremont acquired the extensive Mariposa grant in 1847, and gold was later found in the area. Fremont became wealthy,
and beginning in September 1850 served for the short term as California’s first senator. In 1856 he ran for President on
the new Republican ticket, was defeated, and returned to develop his Mariposa grant. Lawyer and financier Trenor W. Park managed
Fremont’s estate, as well as some other properties in California, and had a one-eighth interest in the Mariposa. Park had
been junior partner in the firm of Halleck, Peachy, Billings and Park, which chiefly dealt with land titles. Fremont would
lose his Mariposa property in 1863 and suffer other financial losses.