Nelson is a member of the Society of California Pioneers. He is listed as arriving in California Aug. 6, 1849. (http://www.nps.gov/safr/historyculture/library-and-research.htm)
1900 Census Record for Nelson Falkinburg ( San Francisco, California)
1880 Census Record for Nelson Falkinburg (San Francisco, San Francisco, California)
1870 Census Record for Nelson Falkinburg (San Francisco Ward 11, San Francisco, California)
1860 Census Record for Nelson H. Falkinburg (Brooklyn, Alameda, California)
Great Register of SF Genealogy (Residence 1866)
Map of Brooklyn, Alameda, CA
Information from sfgenealogy.com
[info] Falkinburg, Nelson Hance, b. NJ 1828, FRAN
[info] Falkinburg, Nelson H., b. NJ 1828 - d. 1903, IOOF
1863 SF directory entry Note that the entry lists Nelson as captain of the steamer Cricket. His residence is given a 352 Third. Is this Third Street or Third Ave. From Mapquest, I feel it is most likely Third St. This would be between Folsom and Harrison. I need to check older SF maps.

A search for steamship Cricket produced the following: Bethlehem Steel Company, San Francisco CA. The site states "Bethlehem San Francisco was founded as Union Brass & Iron Works in 1849, by Peter Donahue, one of San Francisco's three Donahue brothers, who were known as the "iron men". It was sold to Bethlehem Steel in 1906 but continued to use the Union Iron Works name until 1917" There is an entry for a steamship named Cricket. The date seems to be off, however March 1913.
Falkinburg, Caroline H. ... died in 1900 ... age 62 ... SF1900-3319


Note that the notice gives the name of Nelson's Brother-in-laws as WADE. Thus, we now know the name of his wife Caroline H. Wade.
Further information regarding Caroline Falkinburg
The 1867 Great Register lists
Wade, John Holmes; Age: 22; Nativity: Michigan; Occupation: Caulker Residence: Cor. 6th &Brannan Ward: 9 Date of Registraion: July 18, 1866. This is the brother of Caroline.
This is near the residence of Nelson Falkinburg. John is a Caulker--a person who works on ships. We first see that Nelson and Caroline are married in the 1870 census. In the 1880 Census, John H. Wade (age ABT 34) is living with Caroline and Nelson.