Atlas of Hillforts of Britain and Ireland

EN0610 Carnsew, Cornwall

LiDAR 1m DTM Hillshade

LiDAR 1m DTM Hillshade

Satellite Imagery

Satellite Imagery

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HER:  Cornwall and Scilly MCO40 (31934)

NMR:  SW 53 NE 15 (424685)

SM:  1006720

NGR:  SW55643713

X:  155640  Y:  37130  (OSGB36)

Summary

Formerly thought of as a promontory fort, but little now survives to define site and probably small hillslope fort located on slight W-facing lower spur slope near Hayle Estuary, with natural slopes to N and E sides, encloses 0.2ha. Seemingly constructed to overlook the Hayle estuary and prehistoric trackway S of it. Possibly two ramparts, outer surmounting a 16m high cliff. Main rampart only visible in places to N where substantial, with possible annexe. Farming and railway cutting removed nearly all traces of a W rampart, but this may be visible as a change of slope. No evidence for a ditch. Remaining ramparts were walled up and paths cut along them by Henry Harvey in the construction of a park in 1845. Entrance on NW with an enclosure to the E of it and a track leading from it to the shore, but this may possibly be modern. Granite grave slab of about 400 AD was found in 1843. Much mutilated. On 1st Ed OS map (1879). Undated.

Status

Citizen Science:  

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -603843  Y:  6478134  (EPSG: 3857)

Longitude:  -5.424414163206788  Latitude:  50.18360355184236  (EPSG:4326)

Country:  England

Current County or Unitary Authority:  Cornwall

Historic County:  Cornwall

Current Parish/Community/Council/Townland:  Hayle

Monument Condition

Much mutilated by farm, railway and park construction. All of W side gone. On Heritage at Risk Register (2015).

Condition:
Extant  
Cropmark  
Likely Destroyed  

Land Use

Farm, railway and park construction.

Current Use:
Woodland  
Commercial Forestry Plantation  
Parkland  
Pasture (Grazing)  
Arable  
Scrub/Bracken  
Bare Outcrop  
Heather/Moorland  
Heath  
Built-up  
Coastal Grassland  
Other  

Landscape

Hillfort Type

Formerly thought of as a promontory fort (aka cliff castle), but little now survives to define site and probably small hillslope fort on slight W-facing lower spur slope, near Hayle Estuary with natural slopes defending the N and E sides.

Type:
Contour Fort  
Partial Contour Fort  
Promontory Fort  
Hillslope Fort  
Level Terrain Fort  
Marsh Fort  
Multiple Enclosure Fort  

Topographic Position

Natural slopes defend the north and east side

Position:
Hilltop  
Coastal Promontory  
Inland Promontory  
Valley Bottom  
Knoll/Hillock/Outcrop  
Ridge  
Cliff/Plateau-edge/Scarp  
Hillslope  
Lowland  
Spur  

Dominant Topographic Feature:  W-facing slope of spur

Aspect:
North  
Northeast  
East  
Southeast  
South  
Southwest  
West  
Northwest  
Level  

Altitude:  17.0m

Boundary

N/A


Dating Evidence

None

Reliability:  D - None

Principal Activity:
Pre 1200BC  
1200BC - 800BC  
800BC - 400BC  
400BC - AD50  
AD50 - AD400  
AD400 - AD 800  
Post AD800  
Unknown  

Other Activity:
Pre Hillfort:   None
Post Hillfort:   Farm, railway and park construction.

Evidence:No related records

Investigation History

On 1st Ed OS map (1879). Field investigation Ordnance Survey 1962.

Investigations:
1st Identified Map Depiction (1879):   OS map
Other (1962):   Field investigation OS.

Interior Features

Granite grave slab of about 400 AD was found in 1843.

Water Source

None

Source:
None  
Spring  
Stream  
Pool  
Flush  
Well  
Other  

Surface

None

Interior Features (Surface):
No Known Features  
Round Stone Structures  
Rectangular Stone Structures  
Curvilinear Platforms  
Other Roundhouse Evidence  
Pits  
Quarry Hollows  
Other  

Excavation

None

Interior Features (Excavation):
No Known Excavation  
Pits  
Postholes  
Roundhouses  
Rectangular Structures  
Roads/Tracks  
Quarry Hollows  
Other  
Nothing Found  

Geophysics

None

Interior Features (Geophysics):
No Known Geophysics  
Pits  
Roundhouses  
Rectangular Structures  
Roads/Tracks  
Quarry Hollows  
Other  
Nothing Found  

Finds

Granite grave slab of about 400 AD was found in 1843.

Interior (Finds):
No Known Finds  
Pottery  
Metal  
Metalworking  
Human Bones  
Animal Bones  
Lithics  
Environmental  
Other  

Aerial

None

Interior Features (Aerial):
APs Not Checked  
None  
Roundhouses  
Rectangular Structures  
Pits  
Postholes  
Roads/Tracks  
Other  

Entrances

No entrance visible.

Total Number of Breaks Through Ramparts:  
0:   None

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  

Chevaux de Frise:  

Entrances:No related records

Enclosing Works

Possible two ramparts, the outer surmounting a 16m high cliff. Main rampart only visible in places to N where substantial, with possible annexe. Farming and railway cutting removed nearly all traces of a W rampart, but this may be visible as a change of slope. Remaining ramparts were walled up and paths cut along them by Henry Harvey in the construction of the park in 1845. Entrance. No evidence for a ditch.

Enclosed Area:
Area 1:   0.2ha.
Total:   0.2ha.

Total Footprint Area:  Noneha.

Ramparts

None

Multi-period Enclosure System:
✗   None

Ramparts Form a Continuous Circuit:
✗   Site much mutilated.

Number of Ramparts:  
NE Quadrant:   1
SE Quadrant:   0
SW Quadrant:   0
NW Quadrant:   0
Total:   1

Morphology

Current Morphology:
Partial Univallate  
Univallate  
Partial Bivallate  
Bivallate  
Partial Multivallate  
Multivallate  
Unknown  

Detailed Morphology:
Partial Univallate  
Univallate  
Partial Bivallate  
Bivallate  
Partial Multivallate  
Multivallate  

Surface Evidence

None

Enclosing Works (Surface):
None  
Earthen Bank  
Stone Wall  
Rubble  
Wall-walk  
Evidence of Timber  
Vitrification  
Other Burning  
Palisade  
Counter Scarp Bank  
Berm  
Unfinished  
Other  

Excavated Evidence

None

Enclosing Works (Excavation):
None  
Earthen Bank  
Stone Wall  
Murus Duplex  
Timber-framed  
Timber-laced  
Vitrification  
Other Burning  
Palisade  
Counter Scarp Bank  
Berm  
Unfinished  
No Known Excavation  
Other  

Other

Gang Working:
✗   None

Ditches:
✗   None visible.

Number of Ditches:  0

Annex:
✓   Possible annexe, but mutilations so severe to make definition difficult.

References

Buck, C. and Smith, J. R. 1995. Hayle Town Survey, Unpublished report, Cornwall Archaeological Unit, Cornwall County Council.

Cahill, N. 2000. Hayle Historical Assessment, Cornwall, Unpublished report, Cornwall Archaeological Unit, Cornwall County Council.

Page, W. ed. 1906. The Victoria History of the County of Cornwall, 1, London: James Street, 468.

Thomas, JI. 1947. Studies in Cornish Archaeology, 62-4.



Terms of Use

This work is licensed under CC BY-SA 4.0 and should be cited as:

Lock, Gary and Ralston, Ian. 2024. Atlas of Hillforts of Britain and Ireland. Available at: https://hillforts.arch.ox.ac.uk


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