Austin-Magie Farm and Mill District, section 14, Oxford Township, north of Oxford, was added to the National Register of Historic Places in 1982. It also is known as the Felix Fryman Farm after a 20th century owner. The web site of the Ohio Historic Preservation Office of the Ohio Historical Society says "the Austin-Magie farm, mill site and millrace are significant as they represent the intensive 19th century agricultural and processing activities in Butler County. From 1815-1916 the Austin-Pugh mills were an integral component of this area's industry and commerce. The main farmhouse, built 1841, is a solid embodiment of rural vernacular architecture, and the associated outbuildings enhance the agrarian setting. The limestone mill foundation and mile-long mill race are tangible evidence of Oxford Township's largest mill complex. Aaron Austin, builder of the house, braced frame building, and mill, owned the property from 1815-1863. Subsequently the property was acquired by David M. Magie, one of Ohio's most prominent stock farmers and swine breeders. As early as 1837 Magie had earned a reputation for his superior breed of swine. These large, well proportioned hogs, forerunners of the Poland-China breed, were widely known as the Magie Breed. Many agrarian historians consider the Poland-China hog Ohio's greatest contribution to the breeding of fine livestock in the United States."
The Black Bridge (or Pugh's Mill Bridge, as area residents called it more than a century ago) spans the Four Mile (Tallawanda) Creek, just north of Oxford near State Route 732," explains a brochure of the Oxford Museum Association (OMA). "Its north end rests on property owned by the Felix Fryman family. Its south end is at the terminus of Corso Road" (that intersects with Morning Sun Road, or Ohio 732, near Somerville Road). "The builder and exact construction date are unknown," the OMA says. "The covered bridge apparently was constructed shortly after J. B. Pugh built a three-story wood structure in which a 16-foot overshot water wheel powered separate grist mill and saw mill. After the mill burned in 1885, the name of the span gradually changed from Pugh's Mill Bridge to the Black Bridge, probably for two reasons: a family named Black lived nearby, and there was a white wooden bridge about a mile down the creek, serving the road which has become Route 73." The 200-foot bridge is owned by the county, but the Oxford Museum Association has assisted in its restoration and maintenance.