Atlas of Hillforts of Britain and Ireland

SC2491 Coll, Dun Dubh, Argyll

Satellite Imagery

Satellite Imagery

HER:  The West of Scotland Archaeology Service 141 (None)

NMR:  NM 15 NE 1 (21547)

SM:  None

NGR:  NM 1836 5942

X:  118360  Y:  759420  (OSGB36)

Summary

This fort on the NW coast of Coll occupies a precipitous promontory which is separated from the mainland along its NE flank by a deep gully. The area enclosed is roughly square, measuring about 80m across (0.6ha), taking in a rocky boss at the SE end, a steep slope dropping into the gully on the NE, and a series of rocky terraces dropping down to the sea on the NW. The main defence comprises a thick wall with a long run of the outer face visible on the crest of the boss on the SE, where there is also an entrance, beyond which there is a short length of an outer wall standing about 1m high in four courses. Traces of a wall are also visible along the edge of the cliff on the SW, while access from the bottom of the gully on the NE is blocked by another length of the wall set at the foot of the slope; in one place its outer face still stands 1.2m high in six courses. The only features visible within the interior are two conjoined sub-circular huts on the boss, the larger measuring about 4.6m by 3.7m within its footings, which appear to have been constructed with material robbed from the adjacent wall.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -734226  Y:  7687225  (EPSG: 3857)

Longitude:  -6.5956668860756595  Latitude:  56.64164916510138  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Argyll & Bute

Historic County:  Argyll

Current Parish/Community/Council/Townland:  Coll

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

None

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:  52.0m

Boundary

N/A


Dating Evidence

Hammerstones and coarse pottery found here by Erskine Beveridge (1903, 13). 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

Photographed from the air by RCAHMS in 1997

Investigations:
1st Identified Written Reference (1900):   Description and photographs by Erskine Beveridge 1896-1901 (1903, 12-13)
Earthwork Survey (1959):   Plan (RCAHMS AGD 575/2)
1st Identified Map Depiction (1972):   Surveyed at 1:2500 by the OS
Earthwork Survey (1975):   Plan and description (RCAHMS 1980, 77, no.134, fig 60; RCAHMS AGD 575/1)

Interior Features

Featureless apart from two later sub-circular huts

Water Source

None

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

Surface

Two conjoined sub-circular huts

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

Hammerstones and coarse pottery found here by Erskine Beveridge (1903, 13)

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

Aerial

Two conjoined sub-circular huts

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:   Discontinuous circuit

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  ✗

Chevaux de Frise:  ✗

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

Enclosing Works

Traces of single wall along the NE and SW margins of a promontory and two walls on the SE

Enclosed Area:
Area 1:   0.62ha.
Total:   0.62ha.

Total Footprint Area:  0.64ha.

Ramparts

None

Multi-period Enclosure System:
✗   None

Ramparts Form a Continuous Circuit:
✗   None

Number of Ramparts:  
NE Quadrant:   1
SE Quadrant:   2
SW Quadrant:   1
NW Quadrant:   0
Total:   2

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:  None

Annex:
✗   None

References

Beveridge, E (1903) Coll and Tiree: their prehistoric forts and ecclesiastical antiquities with notices of ancient remains in the Treshnish Isles. Edinburgh

RCAHMS (1980) The Royal Commission on the Ancient and Historical Monuments of Scotland. Argyll: an inventory of the monuments volume 3: Mull, Tiree, Coll and Northern Argyll (excluding the early medieval and later monuments of Iona). HMSO: Edinburgh



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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