JOHN S. SWART (b. Iowa, 1835; active in Petaluma by June 1880) Swart was a partner in “Miltz & Swart’s San Francisco Gallery,” 180 Fourth Street, Santa Rosa, 1877-80. It is know he was working in Petaluma by June 1880 and later traveled to Nevada. Mautz, pg. 146.
Unfortunately, the PHL&M owns no portraits by this important, early photographer.