Question: What county is the city of Clayton in the state where the Isaac Glaspell House is?

full_context: Document 1: William T. Goodrich House: The William T. Goodrich House is located on the east side of Davenport, Iowa, United States. It has been listed on the National Register of Historic Places since 1983. William T. Goodrich was a harness maker and a foreman at the Rock Island Arsenal. The 2½-story frame structure features the asymmetry and irregular plan that are typical of the Queen Anne style. The corner tower and the broad wrap-around porch are prominent features. It is located on a raised corner lot that gives the house an added sense of prominence.
Document 2: Summit Township, Clay County, Iowa: Summit Township is a township in Clay County, Iowa, USA. As of the 2000 census, its population was 452. Spencer Municipal Airport is located in the township.
Document 3: Davenport Public Library: The Davenport Public Library is a public library located in Davenport, Iowa. With a history dating back to 1839, the Davenport Public Library's Main Library is currently housed in a 1960s building designed by Kennedy Center architect Edward Durell Stone. The Davenport Public Library system is made up of three libraries—the Main Library at 321 Main Street; the Fairmount Branch Library at 3000 N. Fairmount Street; and the Eastern Avenue Branch Library at 6000 Eastern Avenue.
Document 4: Clay City Township, Clay County, Illinois: Clay City Township is one of twelve townships in Clay County, Illinois, USA. As of the 2010 census, its population was 1,287 and it contained 649 housing units.
Document 5: Clayton Township, Perry County, Ohio: Clayton Township is one of the fourteen townships of Perry County, Ohio, United States. The 2000 census found 1,432 people in the township.
Document 6: Dow City, Iowa: Dow City is a city in Crawford County, Iowa, United States, along the Boyer River. The population was 510 at the 2010 census.
Document 7: Clayton, Iowa: Clayton is a city in Clayton County, Iowa, United States. The population was 43 at the 2010 census, down from 55 at the 2000 census. Clayton is located directly on the Mississippi River and is only accessible by a very steep road. Many people have summer homes in Clayton due to its proximity to the Mississippi River.
Document 8: Everly, Iowa: Everly is a city in Clay County, Iowa, United States. The population was 603 in the 2010 census, a decline from 647 in the 2000 census. The Ocheyedan River flows to the south and west of the city.
Document 9: Israel Hall House: The Israel Hall House is a historic building located on the east side of Davenport, Iowa, United States. By the time this house was built, Israel Hall had retired and was serving as the secretary-treasurer of the Oakdale Cemetery Corporation. He may have used it as a boarding house as well. The two-story brick house is a late example of the Greek Revival style. The side gable is influenced by the Georgian Revival as opposed to the temple front that is more typical of the Greek Revival. The round-arch window in the attic is typical feature found in Davenport residential architecture in this era. An addition to the back of the house was built around 1895. The house features a gabled roof, while the addition featured a hipped roof. The single bay porch on the front of the house replaced a full sized porch that was also not original, but replaced the original single-bay porch. The house rests on a raised lot and is set back from the street level. It has been listed on the National Register of Historic Places since 1984.
Document 10: Clayton, Missouri: Clayton is a city in and the county seat of St. Louis County, Missouri, United States, and borders the city of St. Louis. The population was 15,939 at the 2010 census. The city was organized in 1877 and is named after Ralph Clayton, who donated the land for the courthouse. The city is known for its multiple skyscrapers in its business district.
Document 11: Isaac Glaspell House: The Isaac Glaspell House is a historic building located on the east side of Davenport, Iowa, United States. Isaac Glaspell was a local grocer in the 1870s and 1880s and had this Greek Revival house built during that time. It is a two-story structure that features a front gable, three bay façade, with a single bay side wing. The exterior is composed of brick with stone and wood trims. The house is a vernacular form of the Greek Revival style found in Davenport. The notable details on this house are the bracketed eaves and the flat arch window heads that are topped by keystone brick hoods. The house had at least one wrap-around porch porch that was believed to have been added around the turn of the 20th-century. It may have replaced an earlier porch, but it is no longer extant. The house sits on a raised lot. It has been listed on the National Register of Historic Places since 1983.
Document 12: Glick–Sower House: The Glick–Sower House, also known as the Susie Sower House, is located in Marshalltown, Iowa. The house was built in 1859 for Dr. George Glick and has been listed on the National Register of Historic Places since 1993. It is operated as a historic house museum by the Historical Society of Marshall County.
Document 13: Charles F. Ranzow and Sons Building: The Charles F. Ranzow and Sons Building is a historic building located on Lot 1, Block 18 of the original town of Davenport, Iowa, United States. It is part of the West Third Street Historic District, which was added to the National Register of Historic Places in 1983. The building was individually listed on the Davenport Register of Historic Properties in 2000.
Document 14: Clayton Township, Adams County, Illinois: Clayton Township is one of twenty-two townships in Adams County, Illinois, United States. As of the 2010 census, its population was 1,027 and it contained 465 housing units.
Document 15: D.C. Eldridge House: The D.C. Eldridge House is a historic building located on the east side of Davenport, Iowa, United States. It has been listed on the National Register of Historic Places since 1984.
ground_truth: Clayton County
sub_queries: In which state is Isaac Glaspell House located? Answer: Iowa
Clayton, Iowa >> located in the administrative territorial entity Answer: Clayton County