Question: A tintype image of White Hair can be see at a museum in a city that is the county seat of what county?

full_context: Document 1: Plenty Coups: In Crow called Alaxchiiaahush / Alaxchíia Ahú (″Many War Achievements″), he is better known by his English name as Plenty Coups (a translation of his name, coming from the word coup, meaning "counting many coups (war achievements"); 1848 – 1932) was the "Ashbacheeítche" (″Chief Of The Camp″, band chief) of the Mountain Crow Band (Ashalaho/, later: Awaxaawaxammilaxpáake) of the Crow Nation (Apsáalooke), a visionary leader, and a great diplomat.
Document 2: Isomgosiono: Isomgosiono, "Queen Anne", 1703 Treaty Signer for Pan NA Federation along with Sachem George Skipper of the Nottoway/Chero-en-ha-ka/Iroquois. These pan Native American communities go back to what may be communities formed per the one reference on the Capt John Smith Map of 1656 listing a single Shawnee group in the Susquahanna Valley when he mapped the area at that time. This map is found in the appendix of the Capt. John Smith Trail of the National Colonial Park System. The parent of Queen Anne is of the Shawnee of that mapped valley and they had been brought over by Pardo in 1570, according to carbon dating of their settlement area (Langston-MOretti, National Park Service, Ch. 4, Archaeology Study ) along with the Old Cheraw, after Pardo conquered the 20,000 Wichita, Kansas Iowans who lived there. Of those who were left, some were enslaved as "Monocan" (means Hemp Grower in Chiwere) and brought to the Susquahanna.(NPS Langston-Moretti, Ch. 4 and 10 of Weromicococo State Park/National Colonial Park Archaeology Study). The Cheraw were listed as Xualla by Pardo, Sara by the Tazewell, TN group found by Pardo, and Charra by cartographers of the blended 1724 encampment of surviving small pox plaqued tribes who had to put aside their differences who would not normally have lived near each other.
Document 3: Osage Indian murders: The Osage Indian murders were a series of murders of Osage people in Osage County, Oklahoma in the early 1920s; newspapers described the increasing number of unsolved murders as the "Reign of Terror". Estimates are that 60 or more wealthy, full-blood Osage native Americans were killed from 1921 to 1925. The murders appear to have been committed by people intent on taking over the great wealth of the Osage, whose land was producing valuable oil, and who each had headrights that earned lucrative annual royalties. Investigation by law enforcement, including the predecessor to the FBI, also revealed extensive corruption among local officials involved in the Osage guardian program. Most of the murders were never prosecuted, but some men were convicted and sentenced.
Document 4: Stillwater, Oklahoma: Stillwater is a city in north east Oklahoma at the intersection of US-177 and State Highway 51. It is the county seat of Payne County, Oklahoma, United States. As of 2012, the city population was estimated to be 46,560, making it the tenth largest city in Oklahoma. Stillwater is the principal city of the Stillwater Micropolitan Statistical Area which had a population of 78,399 according to the 2012 census estimate. Stillwater was part of the first Oklahoma Land Run held April 22, 1889, when the Unassigned Lands were opened for settlement and became the core of the new Oklahoma Territory. The city charter was adopted on August 24 later that year. Stillwater is home to the main campus of Oklahoma State University, as well as a branch of Northern Oklahoma College, Meridian Technology Center, and the Oklahoma Department of Career and Technology Education.
Document 5: Big Skin Bayou: Big Skin Bayou, also known as Skin Bayou or Big Skin Creek, is a tributary of the Arkansas River located in Sequoyah County, Oklahoma. It takes its name from the French word "skein" which are loose, tangled layers of yarn. A large, colorful canebrake resembling yarn; formed a near impenetrable, natural wall near the mouth of the creek before it was cleared for farming. French trappers and explorers named several of the major tributaries of the Arkansas River in Oklahoma; as it was once a part of the French Territory of Louisiana that was later the Louisiana Purchase. At one time, there were large rock bluffs near Big Skin's confluence with the Arkansas (most of these bluffs were later destroyed to provide rock fill for the W.D. Mayo Lock and Dam). The bluff on the south side (LeFLore County side) of the river and across from Big Skin's confluence was known as Swallow Rock, named for the birds that nested there and was the site of the old Fort Coffee. The bluff on the north side of the river (Sequoyah County side) and west of Big Skin is known as Wilson Rock (on some maps listed as Wilson's Rock). Both bluffs formed a natural wharf and served as historic steamboat landings and ferry crossings. The cemetery at Wilson Rock contains the graves of local residents as well as some travelers that fell victim to the river over the years. Tiana, the wife of the famed Texan Sam Houston was buried at Wilson Rock Cemetery for several years until she was moved to a cemetery near Fort Gibson. Wilson Rock and Big Skin Bayou were also drop off points for several groups of Cherokees that were forced to relocate to that part of Oklahoma/Indian Territory on the Trail of Tears. The relocated tribesmen that disembarked here would then follow the creek into the interior parts of Skin Bayou District where they settled. Most of eastern Sequoyah County was included in the "Skin Bayou District" of Cherokee Nation, Indian Territory; which also took its name from the creek.
Document 6: Osage City, Kansas: Osage City is a city in Osage County, Kansas, United States. As of the 2010 census, the city population was 2,943.
Document 7: Osage County, Kansas: Osage County (county code OS) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 16,295. Its county seat is Lyndon, and its most populous city is Osage City. The county was originally organized in 1855 as Weller County, and was renamed in 1859 after the Osage River that runs through it, which is itself named for the Osage Native American Tribe.
Document 8: Osage Hills: The Osage Hills is a hilly area in Oklahoma, commonly known as "The Osage". The name refers to the broad rolling hills and rolling tallgrass prairie and Cross Timbers encompassing Osage County and surrounding areas, including portions of Mayes, Tulsa, Washington and Kay Counties. The Osage is the southern extension of the Flint Hills of Kansas.
Document 9: Osage, Oklahoma: Osage is a town in Osage County, Oklahoma, United States. Also known as Osage City, it lies within the Osage Reservation on the shore of Lake Keystone. The population was 156 at the 2010 census, down 17 percent from 188 at the 2000 census.
Document 10: Osage County, Oklahoma: Osage County is the largest county by area in the state of Oklahoma in the United States. Created in 1907 when Oklahoma was admitted as a state, the county is named for and is home to the federally recognized Osage Nation. The county is coextensive with the Osage Nation Reservation, established by treaty in the 19th century when the Osage relocated there from Kansas. The county seat is in Pawhuska, Oklahoma, one of the first three towns established in the county. The total population of the county is 47,987.
Document 11: Pawhuska, Oklahoma: Pawhuska is a city in and the county seat of Osage County, Oklahoma, United States.
Document 12: Chieftains Museum (Major Ridge Home): Chieftains Museum, also known as the Major Ridge Home, is a two-story white frame house built around a log house of 1792 in Cherokee country (today it is within present-day Rome, Georgia). It was the home of the Cherokee leader Major Ridge— notable for his role in negotiating and signing the Treaty of New Echota of 1835, which ceded the remainder of Cherokee lands in the Southeast to the United States. He was part of a minority group known as the Treaty Party, who believed that relocation was inevitable and wanted to negotiate the best deal with the United States for their people. The chiefs had agreed they could not go to war against the United States on the removal issue, but most other Cherokee opposed Ridge and the Treaty Party. He and some other members of the Treaty Party were murdered after removal to the Cherokee Nation in Indian Territory for having ceded the tribe's communal lands, as this was considered a capital crime.
Document 13: Hanging Maw: Hanging Maw, or Uskwa'li-gu'ta in Cherokee, was the leading chief of the Overhill Cherokee from 1788 to 1794. They were located in present-day Tennessee. He became chief following the death of Old Tassel, during the troubled period following the destruction of the traditional capital at Chota.
Document 14: White Hair: White Hair (Pawhuska) is the English name of several Osage leaders in the eighteenth and nineteenth century. A tintype image of White Hair can be seen at the Osage Nation Museum in Pawhuska, Oklahoma.
Document 15: Black Dog (Osage chief): Black Dog (1780 - 1848) was a notable chief of the Osage Nation. This man was the father of a son who was also named Black Dog and who was an Osage chief during the second half of the 19th Century. Many sources refer to the father as Black Dog I and the son as Black Dog II (1827-1910). The son reportedly became chief in 1870.
ground_truth: Osage County