Atlas of Hillforts of Britain and Ireland

SC2806 Altanduin, Sutherland (Allt An Duin 2)

Satellite Imagery

Satellite Imagery

HER:  Highland HER MHG45706 (None)

NMR:  NC 82 NW 4 (6692)

SM:  None

NGR:  NC 8097 2605

X:  280970  Y:  926050  (OSGB36)

Summary

The robbed broch on the steep-sided promontory overlooking the haughland at the confluence of Allt an Duin and Abhainn na Frithe stands within an outer defence drawn across the approach from the SW. The broch is little more than a stony mound, but the outer defences, where they are best preserved on the SW, comprise two ditches with a medial stone-faced rampart; the inner ditch is up to 7.5m in breadth by 3m in depth, and there is an entrance causeway on the S, beyond which on the SE the outer ditch disappears and the rampart has been severely reduced. A few possible facing stones on the N led an RCAHMS investigator in 1991 to suggest that the outer rampart may originally have encompassed the whole broch. Be that as it may an irregular area on the crest of the promontory, measuring up to 38m from NE to SW by 30m transversely (0.08ha), is cut off behind the defences on the SW. A later rectangular building has been constructed between the broch and the lip of the inner ditch on the E.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Unconfirmed

Location

X:  -448315  Y:  8010972  (EPSG: 3857)

Longitude:  -4.027278101123766  Latitude:  58.20720763893218  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Highland

Historic County:  Sutherland

Current Parish/Community/Council/Townland:  Kildonan

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:  155.0m

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:   Heavy robbing

Evidence:No related records

Investigation History

None

Investigations:
1st Identified Map Depiction (1871):   Annotated Pictish Tower on the 1st edition OS 6-inch map (Sutherland 1879, sheet 66; Name Book, Sutherland, No.26, p38)
Other (1909):   Description (RCAHMS 1911, 106, no.313)
Other (1991):   Description by RCAHMS

Interior Features

Featureless apart from the broch and a later township building

Water Source

None

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

Surface

the broch and a later township building

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

The broch

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:   Heavily degraded circuit

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:
1. Simple Gap (South):   None

Enclosing Works

Twin ditches with a medial rampart cutting across a promontory

Enclosed Area:
Area 1:   0.08ha.
Total:   0.08ha.

Total Footprint Area:  Noneha.

Ramparts

None

Multi-period Enclosure System:
✗   None

Ramparts Form a Continuous Circuit:
✗   None

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

Medial rampart between two ditches; no evidence of an inner rampart recorded

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:  2

Annex:
✗   None

References

Name Book, Ordnance Survey Object Name Books (6 inch and 1/2500 scale); available https://www.scotlandsplaces.gov.uk/

RCAHMS (1911) The Royal Commission on the Ancient and Historical Monuments and Constructions of Scotland. Second report and inventory of monuments and constructions in the county of Sutherland. 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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