Atlas of Hillforts of Britain and Ireland

IOM3343 Cass ny Hawin, Middle (Cas-Ny-Hawin; Jackdaw Harbour; Cashtal Rhunt)

Satellite Imagery

Satellite Imagery

HER:  Isle of Man 74 (None)

NMR:  SC26NE 3 (29926)

SM:  None

NGR:  SC29776925

X:  229770  Y:  469250  (OSGB36)

Summary

Small coastal promontory fort located above mouth of stream on S side of Santon River on small, rocky and sheer headland. Roughly triangular shape, with precipitous cliffs to on E and SE and steep and wide river-course on N. Erosion has probably taken part of the site and present area not defined, but estimated less than 0.5ha. Neck of promontory on W cut off by substantial bank and rock-cut ditch, sectioned by Gelling's excavation on site of 1957 who found earthen bank faced with dry-stone revetment front and rear, 0.5m and 0.6m high respectively. Bank now c. 7m wide and c. 2.2m high externally and to 1.4m internally. Ditch has now virtually gone and only fragments remain on S and NW to c. 6m wide and c. 1m deep. Possible bank replacement of earlier phase. Gelling also excavated rectangular longhouse, 9.8m long by 3.9m to 4.6m wide, with benches cut into bedrock on long sides and part on N end. Timbers would have supported roof and elongated hearth in centre. Possible 5th or 6th century AD, or indeed, more probably, 11th to 13th century date. The only Isle of Man promontory fort where pottery found. Rampart of probable Iron Age date (or less than first century AD), Gelling considering this to be a replacement of an earlier phase, with medieval longhouse occupation on ruinous earlier defences. Site now grass covered with gorse, with longhouse remains now low spread bank. On 1st Ed. OS map (1866-9).

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -512559  Y:  7187397  (EPSG: 3857)

Longitude:  -4.6043939129388285  Latitude:  54.09093291576163  (EPSG:4326)

Country:  Isle of Man

Current County or Unitary Authority:  Middle

Historic County:  Middle

Current Parish/Community/Council/Townland:  Malew

Monument Condition

Site subject to erosion. Longhouse remains now low spread bank and ditch in part only.

Condition:
Extant   ✓
Cropmark   ✗
Likely Destroyed   ✓

Land Use

Site now grass covered with gorse, with longhouse remains now low spread bank.

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

Small coastal promontory fort located above mouth of stream on S side of Santon River on small, rocky and sheer headland. Roughly triangular shape, with precipitous cliffs to on E and SE and steep and wide river-course on N.

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

Topographic Position

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

Dominant Topographic Feature:  Rocky headland

Aspect:
North   ✗
Northeast   ✗
East   ✗
Southeast   ✓
South   ✗
Southwest   ✗
West   ✗
Northwest   ✗
Level   ✗

Altitude:  15.0m

Boundary

N/A


Dating Evidence

Rampart of probable Iron Age date (or less than 1st century AD), Gelling considering this to be a replacement of an earlier phase. Medieval longhouse occupation on ruinous earlier defences, of possible 5th or 6th century AD, or indeed 11th to 13th century date.

Reliability:  C - Low

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:   None

Evidence:No related records

Investigation History

On 1st Ed. OS map (1866-9). Excavation P.S. Gelling 1957. Field survey J. Woodcock 1999. Field visits University of Liverpool 2010, 2011.

Investigations:
Excavation (1957):   P.S. Gelling.
Other (1999):   Field survey J. Woodcock.
Other (2015):   Visited by Hillfort Study Group
1st Identified Map Depiction (None):   OS map.
Other (None):   Field visits University of Liverpool.

Interior Features

Rectangular medieval longhouse excavated by P.S. Gelling 1957, still visible as low spread bank.Pottery from excavation.

Water Source

None

Source:
None   ✓
Spring   ✗
Stream   ✗
Pool   ✗
Flush   ✗
Well   ✗
Other   ✗

Surface

Remains of medieval longhouse visible as low spread bank.

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

Excavation

Rectangular medieval longhouse.

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

None

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

Possible gap on NW.

Total Number of Breaks Through Ramparts:  
1:   None

Number of Possible Original Entrances:  
2:   Possible.

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:
1. Simple Gap (North west):   Possible.

Enclosing Works

Neck of promontory on W cut off by substantial bank and rock-cut ditch, sectioned by Gelling's excavation on site of 1957 who found earthen bank faced with dry-stone revetment front and rear, 0.5m and 0.6m respectively. Bank now c. 7m wide and c. 2.2m high externally and to 1.4m internally. Ditch has now virtually gone and only fragments remain on S and NW to c. 6m wide and c. 1m deep. He thought bank replacement of earlier phase.

Enclosed Area:
Area 1:   Noneha.
Total:   Noneha.

Total Footprint Area:  Noneha.

Ramparts

None

Multi-period Enclosure System:
✓   Area not defined, but estimated less than 0.5ha. Rampart of probable Iron Age date (or less than first century AD), Gelling considering this to be a replacement of an earlier phase. Medieval longhouse occupation on ruinous earlier defences.

Ramparts Form a Continuous Circuit:
✗   None

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

Neck of promontory on W cut off by substantial bank and rock-cut ditch, sectioned by Gelling's excavation on site of 1957 who found earthen bank faced with drystone revetment front and rear.

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:
✓   Ditch only visible in part.

Number of Ditches:  1

Annex:
✗   None

References

Bersu, G. 1949. A promontory fort on the shore of Ramsey Bay, Isle of Man, Antiq J, XXIX, 62-79.

Gelling, P.S. 1959. Excavation of a promontory fort at Cas ny Hawin, Malew, Isle of Man, Proc Isle of Man Nat Hist Antiq Soc, 6.1, 28-38.



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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