Question: What county was John Marsh born in?

Context paragraphs:
Danvers, Massachusetts: Danvers is a town (and census-designated place) in Essex County, Massachusetts, United States, located on the Danvers River near the northeastern coast of Massachusetts.  Originally known as Salem Village, the town is most widely known for its association with the 1692 Salem witch trials.  It is also known for the Danvers State Hospital (one of the state's 19th-century psychiatric hospitals, which was located here) and for Liberty Tree Mall.  As of the 2010 census, the town's population was 26,493.

John Marsh (pioneer): John Marsh was born in 1799 in South Danvers, Massachusetts and died in Pacheco, California in 1856.  He was an early pioneer and settler in Alta California, the first Harvard graduate and the first to practice medicine there.  He knew Hebrew, Latin and Greek, and was the first to compile a dictionary of the Sioux language.  He became one of the wealthiest ranchers in California, and was one of the most influential men in the establishment of California statehood.

Brian Robins: Brian Robins was born in Cheltenham, England, but spent most of his early life in Bournemouth.  An early interest in music took him into the record industry, by which time he had realised that he had no future as a performer.  This, coupled with an interest in history, led him to undertake the four-year History of Music Diploma as an external student at the University of London.  After completing this course with Honours, he was immediately offered a place as a part-time adult education lecturer, an occupation he found extremely rewarding.  By this time he was also working on the extensive manuscript journals of the 18th-century English amateur composer, John Marsh, an undertaking that ultimately resulted in his edited version being published in the United States in 1998.  His most recent book is a study of catch and glee culture in 18th-century England.  He has also written chapters for two anthologies, essays for scholarly journals and presented papers at academic conferences, in addition to contributing entries in the revised "New Grove Dictionary of Music and Musicians" and "The Oxford Dictionary of National Biography".

Marsh Creek Springs, California: Marsh Creek Springs is an unincorporated community in Contra Costa County, California, United States.  It lies at an elevation of 584 feet (178 m).  It consists of approximately 2 by 8 blocks along Marsh Creek Road southeast of Clayton.  The town is named for Marsh Creek, a local stream.  The ZIP Code is 94517.  The community is inside area code 925.  It is named after John Marsh.

John M. Tyson: John Marsh Tyson (born July 14, 1953) is an American jurist and government official, who currently serves as a Judge of the North Carolina Court of Appeals.  He also previously served on the court from 2001 to 2009.

John Marsh Davis: John Marsh Davis(October 12, 1931 – February 22, 2009) was an American architect based in the San Francisco, California Bay Area.  A graduate of the University of Oklahoma School of Architecture and a student of Bruce Goff from 1947 to 1955.  Davis was known for his signature style of Organic Architecture in wineries, single family homes, and mixed use buildings in California and all over the world.  He also was known for his organic interpretation of the American Craftsman style including the Alexander Julian Estate in Ridgefield, Fairfield County, Connecticut.  In his design of the Joseph Phelps Winery he is referred to as "one of a cadre of architects who helped define California organic architecture".  Some considered his aesthetic as bold and confrontational John Marsh Davis' firm's most notable projects include winery architecture for Chateau Souverain Winery in Alexander Valley AVA (co-winner of the American Institute of Architects (AIA) design-excellence award in 1974), Joseph Phelps Winery, Sullivan Vineyards and Rutherford Hill Winery with his partner/architect Violeta Autumn as well as numerous private residences including the Donald Barbour house in Kentfield, California.  Davis completed several projects with Joseph Phelps, who later bought the winery which bears his name.  Phelps owned a large construction firm and he and Davis worked on Souverain Winery together.  In his later career, Davis became well known for architectural landscaping.

Stone House of John Marsh: The Stone House of John Marsh is a historic stone house in Contra Costa County, California, built in 1855-56.

Marsh Creek State Park (California): Marsh Creek State Historic Park is a California state park in east Contra Costa County, California, United States.  It was named as the newest California State Park on January 27, 2012.  The newly named park (formerly called the Cowell Ranch/John Marsh State Park) contains 3659 acres and is about 3.3 mi south of downtown Brentwood.  It is not open to the public as of January 2015.  No opening date has been announced.

John Marsh (composer): John Marsh (31 May 1752 – 31 October 1828) was an English gentleman, composer, diarist and writer born in Dorking, England.  A lawyer by training, he is known to have written at least 350 compositions, including at least 39 symphonies.  While today known primarily for his music, he also had strong interest in other fields, including astronomy and philosophy, and wrote books about astronomy, music, religion, and geometry.

Violeta Autumn: Violeta Autumn née Eidelman (May 20, 1930 – February 5, 2012) was a Peruvian-born, naturalized American citizen, who became a noted architect and artist in the San Francisco Bay Area, based in Sausalito, California.  She was best known for her works in Organic Architecture, the home she built for herself, and her winery designs with her associate John Marsh Davis as licensed architect in the firm Davis-Autumn Architects Planners.  In addition to architecture, Autumn served on the Planning Commission and City Council for Sausalito from 1965 to 1980.  She wrote cookbooks, designed murals, and illustrated books for other authors, as well.

Supporting paragraphs: John Marsh (pioneer) Danvers, Massachusetts
Answer: Essex County