Porth Hellick Down

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Porth Hellick Down
Porth Hellick Down - geograph.org.uk - 1036.jpg
Great Tomb at Porth Hellick Down
Isles of Scilly UK location map.svg
Archaeological site icon (red).svg
Shown within Isles of Scilly
Region Isles of Scilly
Coordinates 49°55′06″N6°16′52″W / 49.91829°N 6.28113°W / 49.91829; -6.28113
TypeEntrance grave
History
Foundedc.2000-1500 BC
Site notes
Excavation dates1899
ArchaeologistsGeorge Bonsor
Official namePorth Hellick Down
Designated1975
Reference no.304047 [1]

Porth Hellick Down is a Neolithic and Bronze Age archeological site located on the island of St Mary's, in the Isles of Scilly in Great Britain. The ancient burial monument encompasses a large cairn cemetery that includes at least six entrance graves, other unchambered cairns, and a prehistoric field system. The site is notable for having the largest assembly of surviving entrance graves.

Contents

Site description

Porth Hellick Down is located on the island of St Mary's in the Isles of Scilly, overlooking Porth Hellick Bay. [2] The Neolithic and Bronze Age monument encompasses a large cairn cemetery containing several burial cairns, including at least six entrance graves. It also includes an ancient linear boundary and a prehistoric field system, which stretches across the northern and north western section of the Down. It is the largest surviving group of entrance graves in the world. [1] [3]

The Great Tomb

The largest and best preserved entrance grave on the ancient site is a Bronze Age grave (2000-1500 BC) located on the northwestern slope of Porth Hellick Down. The burial monument is situated close to the boundary of a prehistoric field system. The site was excavated by the antiquarian, George Bonsor in 1899. He named the entrance grave, "The Great Tomb". Earlier unrecorded excavations at the site had left the burial chamber empty, except for a piece of pumice and a few remnants of late Bronze Age pottery fragments. Bonsor's excavation is the first excavation in Scilly to be recorded in detail. [4]

The entrance grave sits on a low, circular platform. It consists of a mound that is 12.25m in diameter and up to 1.6m in height. The mound is retained by a kerb of large slabs. The burial chamber measures 3.5m by 1.5m wide and is 1m high. The grave is roofed by four capstones, 2.5m long and 1.25m wide. The burial chamber is D-shaped with two sides that incline westwards to intersect the inner end of the passage. The entrance passage is uncovered. The Great Tomb was restored by the Ministry of Works, which included protecting the burial chamber with new turf. The restoration project damaged the tomb when they removed the grave's outer kerb. It is now in the care of English Heritage. [5] [6]

Selected monuments

The entrance grave that is positioned the furthest west on Porth Hellick Down is the grave known as the "coffin grave". The remains of the burial monument include part of the stone kerb and four capstones covering a coffin-shaped chamber. The mound contains a kerb of large stones, measuring 8.3m by 8m. The burial chamber is oriented east-west, with the entrance facing east. The chamber interior measures 7m by almost 1.5m wide across the middle, with a boat or coffin-shaped layout, the sides curving in slightly to 1m wide at the western end and 0.65m wide at the entrance. The entrance is partially blocked. The chamber walls are lined with stone slabs. Four capstones make up the chamber roof. The chamber of this entrance grave is considered to be an excellent example of a coffin or boat-shaped chamber. [7]

One of the entrance graves on Porth Hellick Down has a burial chamber that is constructed along a massive rock outcrop. The rock is integrated into the grave's structure. The burial chamber consists of a circular mound of stacked rubble, 13m in diameter and 1m high. The southern end of the chamber is lined with large slabs on its west side and a large boulder on the east side. Another large slab sits on the slab walls and provides a roof for the chamber. This grave has survived mostly intact, retaining its original form and layout. It has lost one of its capstones. The incorporation of natural rock outcropping into the grave's structure is an unusual feature of a Scillonian entrance grave. [8]

Porth Hellick Down is the site of a prehistoric linear boundary which traverses its eastern slope. The linear boundary progresses as a nearly straight line of small upright stones, up to 0.5m high and 1.5m to 6m apart. Beginning at the eastern edge of the Down, the linear boundary stretches southeast to northwest for 17m, and then continues for another 23m. The boundary measures up to 1m wide, 0.1 m high and is mainly covered by heather turf. Not typically found in prehistoric Britain, The Isles of Scilly is the setting for a number of linear boundaries that are directly associated with groupings of prehistoric burial monuments. [9]

See also

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References

  1. 1 2 "Monument No. 304047". Historic England: Pastscape. Retrieved 18 July 2020.
  2. "Porth Hellick Down Burial Chamber". MapCarta. Retrieved 18 July 2020.
  3. "Kerbed platform cairn 90m north west of Old Rock, Porth Hellick Down, St Mary's". Historic England. Retrieved 18 July 2020.
  4. "Porth Hellick Down Burial Chamber, St Marys, Isles of Scilly". Historic England. Retrieved 18 July 2020.
  5. "Porth Hellick Down Burial Chamber". English Heritage. Retrieved 18 July 2020.
  6. "Prehistoric entrance grave and regular field system on north western Porth Hellick Down, St Mary's". Historic England. Retrieved 18 July 2020.
  7. "Entrance grave 80m SSE of Basin Rock, Porth Hellick Down, St Mary's". Historic England. Retrieved 19 July 2020.
  8. "Entrance grave 47m north west of Old Rock, Porth Hellick Down, St Mary's". Historic England. Retrieved 19 July 2020.
  9. "Prehistoric linear boundary south east of Horse Rock on Porth Hellick Down, St Mary's". Historic England. Retrieved 19 July 2020.