The Mason–Dixon line, also called the Mason and Dixon line or Mason's and Dixon's line, is a demarcation line separating four U.S. states, forming part of the borders of Pennsylvania, Maryland, Delaware, and West Virginia. It was surveyed between 1763 and 1767 by Charles Mason and Jeremiah Dixon as part of the resolution of a border dispute involving Maryland, Pennsylvania, and Delaware in the colonial United States. The dispute had its origins almost a century earlier in the somewhat confusing proprietary grants by King Charles I to Lord Baltimore (Maryland), and by his son King Charles II to William Penn.
London Britain Township is a township in Chester County, Pennsylvania, United States. The population was 3,139 at the 2010 census. White Clay Creek Preserve is a Pennsylvania state park in London Britain Township, along White Clay Creek.
Newlin Township is a township in Chester County, Pennsylvania, United States. The population was 1,285 at the 2010 census.
West Bradford Township is a township that is located in Chester County, Pennsylvania, United States. The population was 12,376 at the time of the 2010 census.
Concord Township is a township in Delaware County, Pennsylvania, United States. The population was 17,231 at the 2010 census. It contains the unincorporated communities of Concordville and Glen Mills.
Charles Mason was an English-American astronomer who made significant contributions to 18th-century science and American history, particularly through his survey with Jeremiah Dixon of the Mason–Dixon line, which came to mark the border between Maryland and Pennsylvania (1764–1768). The border between Delaware and Maryland is also defined by a part of the Mason–Dixon line.
Jeremiah Dixon was an English surveyor and astronomer who is best known for his work with Charles Mason, from 1763 to 1767, in determining what was later called the Mason–Dixon line.
Brandywine Creek is a tributary of the Christina River in southeastern Pennsylvania and northern Delaware in the United States. The Lower Brandywine is 20.4 miles (32.8 km) long and is a designated Pennsylvania Scenic River with several tributary streams. The East Branch and West Branch of the creek originate within 2 miles (3 km) of each other on the slopes of Welsh Mountain in Honey Brook Township, Pennsylvania, about 20 miles (32 km) northwest of their confluence.
Chadds Ford Township is an affluent township in Delaware County, Pennsylvania, United States. It is located about 25 miles (40 km) southwest of Philadelphia.
The Wedge is a 1.068-square-mile tract of land along the borders of Delaware, Maryland and Pennsylvania. Ownership of the land was disputed until 1921; it is now recognized as part of Delaware. The tract was created primarily by the shortcomings of contemporary surveying techniques when the boundaries were defined in the 18th century. It is bounded on the north by an eastern extension of the east–west portion of the Mason–Dixon line, on the west by the north–south portion of the Mason–Dixon line, and on the southeast by the Twelve-Mile Circle around New Castle, Delaware. The crossroads community of Mechanicsville, Delaware, lies within the area today.
White Clay Creek Preserve is a 3,050-acre (1,230 ha) Pennsylvania state park along the valley of White Clay Creek in London Britain Township in Chester County, Pennsylvania in the United States. The park was donated by the DuPont Company in 1984 for the purpose of "preserving the diverse and unique plant and animal species, and the rich cultural heritage of the area". Dupont also donated an additional 528 acres (214 ha) for the adjoining White Clay Creek State Park to the state of Delaware. White Clay Creek Preserve is 3 miles (4.8 km) north of Newark, Delaware on Pennsylvania Route 896.
Pennsylvania Route 162 is a 10.1-mile-long (16.3 km) state highway in southeast Pennsylvania. The western terminus of the route is at PA 82/PA 842 in Unionville, Chester County. The eastern terminus is at U.S. Route 322 Business in West Chester. PA 162 is known as Embreeville Road from its western terminus to the village of Embreeville and Telegraph Road from Embreeville to an intersection with Strasburg Road west of Marshallton. At this point, the route turns east, following Strasburg Road to US 322 Bus. in West Chester. The portion of road between Marshallton and West Chester follows the 17th-century Great Minquas Path and became part of the Strasburg Road linking Strasburg and Philadelphia in the 1770s. PA 162 was designated onto its current alignment by 1930.
Pennsylvania Route 842 is a state highway in Chester County, Pennsylvania. The route runs from PA 841 in West Marlborough Township to U.S. Route 322 Business in downtown West Chester. PA 842 runs through rural areas with some development between PA 841 and West Chester as a two-lane undivided road. Along this stretch, the route forms a concurrency with PA 82 in Unionville, where it intersects the western terminus of PA 162. In West Chester, PA 842 is routed along one-way streets. PA 842 was first designated by 1928 between PA 82 in Unionville and US 122/PA 5/PA 62 in West Chester. The route was extended west to PA 841 in 1937.
The West Branch Brandywine Creek is a 33.1-mile-long (53.3 km) tributary of Brandywine Creek in Chester County, Pennsylvania in the United States.
Embreeville is a historical unincorporated community, little more than a rural stretch of road with a few businesses and homes, in Newlin Township, Pennsylvania, United States, on a bend of Brandywine Creek. It is approximately 30 miles (48 km) west of Philadelphia, and north of Unionville. The Embreeville Historic District, which covers most of the town, is on the National Register of Historic Places.
The Newlin Mill Complex, also referred to as The Newlin Grist Mill, is a water-powered gristmill on the west branch of Chester Creek near Concordville, Pennsylvania built in 1704 by Nathaniel and Mary Newlin and operated commercially until 1941. During its three centuries of operation, the mill has been known as the Lower Mill, the Markham Mill, the Seventeen-O-Four Mill and the Concord Flour Mill. In 1958 the mill property was bought by E. Mortimer Newlin, restored and given to the Nicholas Newlin Foundation to use as a historical park. Water power is still used to grind corn meal which is sold on site. The park includes five historical buildings, which were added to the National Register of Historic Places in 1983, and 150 acres (61 ha) of natural woodland.
Newlin Miller's House was built by William Newlin during the early nineteenth century in West Whiteland Township, Chester County, Pennsylvania. It is located in the narrow valley of Little Broad Run, a tributary of the East Branch of Brandywine Creek.
Hannah Freeman, also known as "Indian Hannah," was a Lenape healer, artisan, and farmer who historically was thought to be the last surviving member of the Lenape in Chester County, Pennsylvania.
The Hayes Mill House is an historic, American home that is located in Newlin Township, Chester County, Pennsylvania.
The Penn–Calvert boundary dispute was a long-running legal conflict between William Penn and his heirs on one side, and Charles Calvert, 3rd Baron Baltimore and his heirs on the other side. The overlapping nature of their charters of land in Colonial America required numerous attempts at mediation, surveying, and intervention by the king and courts of England to ultimately be resolved. Subsequent questions over these charters have also been adjudicated by American arbitrators and the Supreme Court of the United States. The boundary dispute shaped the eventual borders of five U.S. states: Pennsylvania, Maryland, Delaware, New Jersey, and West Virginia.
