A.J. Seay Mansion in Kingfisher, Oklahoma. From the Oklahoma Historical Society: Governor Seay served as second Territorial Governor of Oklahoma from 1892 to 1893, built the three-story mansion named "Horizon Hill" for approximately $11,000.00 on fifteen acres of land purchased for $637.50, just outside of Kingfisher, OT. The mansion was completed in March of 1892 to host dignitaries present for the opening of the Cheyenne and Arapaho Land Run.