Hayes Mill HouseThe Hayes Mill House is an historic, American home that is located in Newlin Township, [Chester County, Pennsylvania|Newlin Township], Chester County, Pennsylvania.It was added to the National [Register of Historic Places] in 1985.History and architectural featuresThis historic structure is located nearly opposite the Star Gazers' Stone. It was built circa 1780, and is a two-story, three-bay, single-pile, stone dwelling with a gable roof. It has a two-story frame wing. The main section features a corbeled stone cornice.