Atlas of Hillforts of Britain and Ireland

SC0128 Portobello, Wigtownshire (Mains of Cairnbrock)

Satellite Imagery

Satellite Imagery

HER:  Dumfries & Galloway MDG545 (None)

NMR:  NW 96 NE 9 (60377)

SM:  4988

NGR:  NW 9609 6641

X:  196090  Y:  566410  (OSGB36)

Summary

This fort is situated on the steep-sided promontory that forms the NW side of the small sandy inlet known as Portobello. The defences, which cut across the neck of the promontory in a shallow arc on the NE, comprise an earthen rampart spread up to 4m in thickness and 0.3m in height, with an external ditch 3.5m in breadth and 0.5m in depth. These terminate 5.5m short of the SE margin of the promontory to form the entrance. The area enclosed on the top of the promontory measures at least 58m from NE to SW by 25m transversely, but at its seaward end the ground falls away SW into a natural fissure, before rising again into a rocky outcrop jutting out into the sea. One later field-bank cuts across the NW end of the defences, crossing the interior to their rear and returning along the SE side, while another lies immediately outside the ditch and appears to respect the position of the entrance.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -577281  Y:  7352276  (EPSG: 3857)

Longitude:  -5.1858040715622895  Latitude:  54.95055541413256  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Dumfries & Galloway

Historic County:  Wigtownshire

Current Parish/Community/Council/Townland:  Kirkcolm

Monument Condition

None

Condition:
Extant   ✓
Cropmark   ✗
Likely Destroyed   ✗

Land Use

None

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

Coastal promontory immediately NW of sea inlet of Portobello.

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:  None

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

Altitude:  15.0m

Boundary

N/A


Dating Evidence

In the absence of excavation, there are neither stratified artefacts nor radiocarbon dates to provide a chronology for the defences.

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:   None

Evidence:No related records

Investigation History

First noted in RCAHMS survey of Marginal Lands in 1951, when a plan was drawn up. It was surveyed by the OS at 1:2500 in 1968, and revisited by RCAHMS in 1984. It was Scheduled in 1991.

Investigations:
1st Identified Written Reference (1951):   RCAHMS MS36/173
Earthwork Survey (1955):   RCAHMS WGD 19/1 & 2
1st Identified Map Depiction (1968):   Surveyed at 1:2500 by the OS
Other (1984):   Description by RCAHMS
Other (1991):   Scheduled

Interior Features

Featureless

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

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

See main summary

Total Number of Breaks Through Ramparts:  
1:   None

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:
1. Simple Gap (North east):   None

Enclosing Works

Earthen rampart with an external ditch

Enclosed Area:
Area 1:   0.12ha.
Total:   0.12ha.

Total Footprint Area:  0.15ha.

Ramparts

None

Multi-period Enclosure System:
✗   The promontory itself extends across a natural cleft at its seaward end, and though this area of broken rock is unusable its inclusion into the interior extends the enclosed area to 0.2 ha.

Ramparts Form a Continuous Circuit:
✗   None

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

Number of Ditches:  1

Annex:
✗   None

References

Feachem, R W (1955) 'Iron Age and early medieval monuments in Galloway and Dumfriesshire'. Trans Dumfriesshire Galloway Natur Hist Antiq Soc, 3 ser, 33 (1954-5), 58-65



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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