From the record
“The Dorsey Mansion is a log and stone mansion built in 1878 by Stephen W. Dorsey, a controversial carpetbagging Republican who served as United States Senator from Arkansas during the Reconstruction from 1873 until 1879.”
Wikipedia article Dorsey Mansion, CC BY-SA 4.0.
One of 30 National Register listings published here for Colfax County · listed in 1970 · category: Building · built in 1878, Gothic architecture.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service