Atlas of Hillforts of Britain and Ireland

SC3679 Pirn Wood, Peeblesshire (Pirnwood)

Satellite Imagery

Satellite Imagery

HER:  Scottish Borders 53170 (None)

NMR:  NT 33 NW 5 (53170)

SM:  1491

NGR:  NT 3357 3726

X:  333570  Y:  637260  (OSGB36)

Summary

This fort is situated overlooking Innerleithen, on the lower SW spur of Pirn Craig. Here a saddle separates it from the main bulk of the hill on the NE, and the ground falls away dramatically from its summit along the NW and SE flanks. The defences of the fort comprise an inner and outer enclosure, the former defended by a single rampart and the outer by up to three, in each case now reduced to a stony scarp. RCAHMS investigators in 1960 were of the opinion that the inner was the earlier, but the relationship on the E, where the perimeter shares a common line with the inner rampart of the outer enclosure is ambiguous and the true sequence can only be established by excavation. Oval on plan, the inner enclosure measures about 105m from NE to SW by 45m transversely (0.36ha) and has entrances on the NE and SW. The outer enclosure is significantly larger, measuring internally about 145m from NE to SW by 60m transversely (0.68ha). Three ramparts can be seen on the N side of the entrance from the saddle on the NE, but elsewhere there are only two, and, like the inner enclosure, these are also pierced by an entrance on the SW. The stances of at least twenty timber round houses can be seen within the interior, fifteen of them within the inner enclosure and five in the space between the it and the outer defences on the SW; the majority are platforms, but in five a small central platform is enclosed by a shallow groove or ditch which forms a ledge where the stance has been cut back into the slope. Two of the houses within the inner enclosure appear to overlie its rampart, probably contributing the view of the RCAHMS investigators that this was the earlier element of the defences. In addition to the defences, a bank reduced to a low scarp has been drawn round the eastern flank of the spur lower down the slope, but its relationship to the fort is not known.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -340247  Y:  7484005  (EPSG: 3857)

Longitude:  -3.0564899810030433  Latitude:  55.624399258228266  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Scottish Borders

Historic County:  Peeblesshire

Current Parish/Community/Council/Townland:  Innerleithen

Monument Condition

None

Condition:
Extant   ✓
Cropmark   ✗
Likely Destroyed   ✗

Land Use

Planted with trees in the early 19th century, it now lies in clearing ground with coniferous and deciduous woodland round about.

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:  230.0m

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:   Planted with trees in the early 19th century

Evidence:No related records

Investigation History

Photographed by RCAHMS Aerial Survey Programme in 1983, 1984 and 2009

Investigations:
1st Identified Map Depiction (1856):   Annotated Fort on the 1st edition OS 25-inch map (Peebles 1859, sheet 14.14)
Other (1863):   Description by William Chambers (1864, 29, 37)
Earthwork Survey (1886):   Sketch-plan and description by David Christison (1887, 26-7, fig 10)
Other (1958):   Scheduled
Earthwork Survey (1960):   Plan and description (RCAHMS 1967, 137-8, no.311, fig 126; RCAHMS PBD 134/1-3)
Other (1961):   Visited by the OS
Other (1974):   Revised at 1:2500 by the OS

Interior Features

At least twenty round-houses (twenty-four identified by the OS), the majority platforms, but including five where an encircling groove or ditch has created a ledge on the backscarp. at least two overlie the inner rampart, while one is drawn on the RCAHMS plan of 1960 as if it is earlier, and they almost certainly represent several periods of construction and may include an unenclosed phase of settlement.

Water Source

None

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

Surface

Ring-grooves encircling platforms

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:  
2:   None

Number of Possible Original Entrances:  
2:   None

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:
1. Simple Gap (North east):   Piercing both the inner and outer enclosures
2. Simple Gap (South west):   Piercing both the inner and outer enclosures

Enclosing Works

An inner enclosure with a single rampart and an outer enclosure with up to three

Enclosed Area:
Area 1:   0.36ha.
Area 2:   0.68ha.
Total:   0.68ha.

Total Footprint Area:  1.3ha.

Ramparts

None

Multi-period Enclosure System:
✓   Clearly a stratigraphic relationship between the inner and outer enclosures, but the sequence of construction is unclear

Ramparts Form a Continuous Circuit:
✓   None

Number of Ramparts:  
NE Quadrant:   4
SE Quadrant:   3
SW Quadrant:   3
NW Quadrant:   2
Total:   4

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

Chambers, W (1864) A History of Peeblesshire. William and Robert Chambers: Edinburgh and London

Christison, D (1887) 'The prehistoric forts of Peeblesshire'. Proc Soc Antiq Scot 21 (1886-7), 13-82

RCAHMS (1967) The Royal Commission on the Ancient and Historical Monuments of Scotland. Peeblesshire: an inventory of the ancient monuments, 2v. 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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