William Hyser (1826 - 1909), pioneer surgeon and Civil War captain, came to Plainfield Township in 1850, when it was a lumber center. In 1852 he built this Greek Revival house as a home and an office for his medical and civic duties. He was at various times township clerk, school inspector and supervisor, and justice of the peace. The house has also served as a stagecoach station and a post office. In 1976 it was moved to its present site. The only remaining structure from the original Plainfield village, it is now restored as a museum.