Question: What county is the William Sewall House located in?
Context: The Capt. Henry E. Sewall House is an historic wooden house now located in Indian RiverSide Park in Jensen Beach, in Martin County, Florida.  Local pioneer and developer Capt. Henry E. Sewall built it in 1889 at the southern tip of Sewall's Point, the peninsula and town which bear his family name.  When Capt. Sewall became the postmaster of Sewall's Point, the house served also as the Sewall's Point post office.  Next to the house Capt. Sewall also built a freight dock that extended into the St. Lucie River along with a storage building at its end. The William Murphy House is a historic house located at 97 Sewall Avenue in Brookline, Massachusetts. The Belmont-Paul Women's Equality National Monument (formerly the Sewall House (1800–1929), Alva Belmont House (1929–1972), and the Sewall-Belmont House and Museum (1972–2016)) is a historic house and museum of the U.S. women's suffrage and equal rights movements located in the Capitol Hill neighborhood of Washington, D.C..  The monument is named after suffragists and National Woman's Party leaders Alva Belmont and Alice Paul. The William Sewall House is a historic house at 1027 Crystal Road in Island Falls, Maine.  Built in 1865, it is a well-preserved example of vernacular Greek Revival style in a rural setting.  The house is notable as the longtime home of a second-generation resident of the community, William Wingate Sewall, who had a long and enduring friendship with Theodore Roosevelt, a regular guest until 1878.  The house was listed on the National Register of Historic Places in 1982.  It is still in the hands of Sewall descendants, operated as a yoga retreat center. Island Falls is a town in Aroostook County, Maine, United States.  The population was 837 at the 2010 census.  Island Falls took its name from an island in the stream at the verge of a waterfall. The Sands Ring Homestead Museum is a historic house located on Main Street in the Town of Cornwall, in Orange County, New York.  It was built in 1760 by Nathaniel Sands for his cousin Comfort Sands.  Comfort’s wife, however, did not want to leave her home on Long Island, so Nathaniel and his family moved in.  In 1777, Nathaniel gave the house as a wedding present to his son David and his bride Clementine Hallock.  David, a member of the Society of Friends, opened the house to the Quaker community as a meetinghouse until the Quaker Meeting House located at 60 Quaker Avenue opened in 1790.  His son David established a store on the site.  It was one of the first meeting places of the Cornwall Quakers. Today it is used as museum featuring Colonial-era activities. Carroll Place, also known as Old Carroll Place, is a historic plantation house located near St. George, Dorchester County, South Carolina.  Research completed circa 2012 at the South Carolina Archives in Columbia S.C. shows the house was built circa 1780, and is a plain two-story, Georgian I-house dwelling.  It is sheathed in clapboard single house and rests upon low brick pillars.  It has a hip roofed verandah supported by six wooden posts.  Its builder was likely Thomas Ferguson or David Campbell.  In 2008 the house was donated to the Dorchester County Historical Society by current owners Fitzhugh Lee Sweatman Jr and his wife, Martha Westbury-Sweatman.  The Dorchester County Historical Society under took an extensive restoration of the Colonial Era Plantation House and when completed, re-designated the house as the Koger-Murray-Carroll house for three of its previous owners who served in the South Carolina General Assembly: Joseph Koger (married the daughter of David Campbell and inherited the house on her death), Soule Murray (purchased the house and land from Joseph Koger), and James Parsons Carroll (purchased the property circa 1850).  James Parsons Carroll also served in the South Carolina Court of Equity as a Chancellor and was a signer of the South Carolina Ordinance of Secession.  Circa 1974 the house was added to the National Historical Register of Places as the "Old Carroll Place" for which it had become known.  The last owner/occupants of the house were the late Fitzhugh Lee Sweatman Sr and his wife Eulalie Knight-Sweatman.  Circa 1970 Mr and Mrs. Sweatman Sr built a smaller one story house off to the side of the Plantation House.  Mr. Sweatman Sr died on the property in 1975. Holly Hall is a historic home located at Elkton, Cecil County, Maryland.  Built by James Sewall ca. 1810-20, it is a 2 ⁄ -story, Federal-style brick mansion built about 1810.  The one-story brick north wing was added as a chapel in the 20th century.  Also on the property is a late-19th-century two-story wood tenant house and two concrete block buildings.  A few holly trees remain of the many which gave this house its name.  Its parapets are unique in Maryland. Haphazard is a historic house located on Pleasant Valley Road in Owensboro, Kentucky.  The house overlooks the Ohio River, and its name is probably derived from the river's eddies.  The property which Haphazard was built on was originally owned by George Mason, a signatory to the U.S. Constitution, who was given the land in a grant surveyed in 1787.  Mason's grandson Richard sold the property to Robert Triplett in 1822, by which point the log house forming the central portion of the home had been built.  Triplett likely added the house's side wings, northern gable, and Federal style interior.  Triplett accomplished many local firsts, as he was Owensboro's first large real estate dealer; Daviess County's first soil conservationist, barge operator, and author; the first distiller on the Ohio River in the county; and the builder of Kentucky's first railroad.  In 1843, A. B. Barret purchased the house from Triplett; Barret then sold the house to William Bell the following year.  Bell, the president of a local bank, likely added the house's Greek Revival portico. The William W. Early House is a Queen Anne-style house located at Brandywine in Prince George's County, Maryland, United States, and is privately owned.  It was constructed in 1907.  According to a 1989 Historic American Buildings Survey report on the house, "The William W. Early House is probably the best example of turn-of-the-century Queen Anne-style domestic architecture in the county."
Answer: Aroostook County, Maine, United States