Atlas of Hillforts of Britain and Ireland

SC1103 Castle O'Er, Dumfriesshire

LiDAR 1m DTM Hillshade

LiDAR 1m DTM Hillshade

Satellite Imagery

Satellite Imagery

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HER:  Dumfries & Galloway MDG7703 (None)

NMR:  NY 29 SW 10 (67376)

SM:  651

NGR:  NY 2419 9285

X:  324190  Y:  592850  (OSGB36)

Summary

This fort, which crowns the summit of Castle O'er Hill, displays evidence of at least two major phases of fortification and has a large annexe on its SE side. In its first phase it was an irregular oval on plan, measuring a maximum of 125m from ENE to WSW by 60m transversely (0.6ha) within twin ramparts with a medial ditch, which have been deployed to enhance the natural topography, particularly on the precipitous SE flank, where the inner rampart follows the crest of the slope, and the ditch and outer rampart the foot, and even the apparently natural sectors of the escarpment between them have probably been modified and steepened. In its second phase, the core of the interior was reduced to an area measuring about 105m from ENE to WSW by 52m transversely (0.4ha) within a single rampart, though the earlier defences at the WSW end were also adapted to form a hornwork around the entrance; there is no evidence of a similar embellishment of the second entrance at the ENE end, but this has been mutilated by the construction of stances for later round-houses, and indeed more recent stone-robbing. No fewer than 29 round-house stances can be seen within the interior, some represented by levelled platforms, others by ring-grooves, in one of the latter comprising no less than three concentric lines. Some of these stances intercut and represent a sequence of occupation, while the platforms apparently overlying the ramparts at the ENE end suggest a final phase of open settlement. The annexe is probably an addition to the fort, enclosing an area of 0.5ha within twin banks with a medial ditch up to 6m in breadth; while an entrance has been left between the annexe and the fort defences at the WSW end, on the ENE its inner bank appears to ride up onto the outer rampart of the phase 1 fort. In plan, it is clearly conceived in conjunction with the linear earthworks that run up to the fort from the N and E, while an evaluation trench dug about 1985 by Roger Mercer demonstrated that a third linear earthwork on the S was constructed after the annexe. Five radiocarbon dates from this and other trenches relate to occupation and use of the fort and annexe during the Roman Iron Age.

Status

Citizen Science:  ✗

Reliability of Data:  Confirmed

Reliability of Interpretation:  Confirmed

Location

X:  -355479  Y:  7405473  (EPSG: 3857)

Longitude:  -3.193321212366522  Latitude:  55.22405822781211  (EPSG:4326)

Country:  Scotland

Current County or Unitary Authority:  Dumfries & Galloway

Historic County:  Dumfriesshire

Current Parish/Community/Council/Townland:  Eskdalemuir

Monument Condition

None

Condition:
Extant   ✓
Cropmark   ✗
Likely Destroyed   ✗

Land Use

Clearing in forestry

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:  265.0m

Boundary

N/A


Dating Evidence

Five radiocarbon dates, but they may all relate to a late phase of occupation in what is almost certainly a complex and longer sequence.

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:
Artefactual:   None
C14:   None

Investigation History

Although it does not appear on Roy's Map (1747-55), William Roy drew up a plan and profiles of the fort for inclusion in his volume on Military Antiquities of the Romans in North Britain (Roy 1793, pl xxvi). Otherwise it was first depicted on William Crawford's Map of Dumfriesshire (1804). The depiction surveyed in 1857 on the 1st edition OS 25-inch map (Dumfriesshire 1862, sheet 35.6) was revised in more detail in 1898 (Dumfriesshire 1899, sheet 35.6), and this latter depiction evidently provided the basis for a plan drawn up in 1912 to accompany the description in the County Inventory for Dumfriesshire (RCAHMS 1920, 71-3, no.177, fig 58). A previous plan drawn by David Christison in the course of excavations carried out by Richard Bell about 1896 (Christison 1898, 159-62, fig 57; Bell 1895; Bell 1905) is a plainly sketch and lacks the metrical accuracy of the OS map. George Jobey drew up a plan in the late 1960's based upon the 1:10,560 OS depiction (Jobey 1971, 82, fig 3) and the OS revised the 1:2500 depiction in 1973, revisiting in 1978. RCAHMS drew up a new plan at 1:1000 in 1980 and evaluation trenches were excavated by Roger Mercer about 1985 (Mercer 1985). RCAHMS returned to prepare a more detailed survey in 1993. It was Scheduled in 1969 and re-scheduled in 2010. Most recently the Forestry Commission have commissioned an aerial survey with a microcopter to create an orthorectified composite vertical aerial photograph and provide images from which Rubicon Heritage have created a contoured surface model of the fort.

Investigations:
Earthwork Survey (1793):   Carried out by William Roy before 1793 (Roy 1793, pl xxvi)
1st Identified Map Depiction (1804):   William Crawford, Map of Dumfries-shire (1804; see also Stat Acct, xii, 1794, 614)
Other (1857):   Annotated Fort on the 1st edition OS 25-inch map (Dumfriesshire 1862, sheet 35.6)
Earthwork Survey (1896):   Description and plan (Christison 1898, 159-62, fig 57)
Excavation (1896):   Richard Bell (Bell 1905)
Earthwork Survey (1912):   Description and plan (RCAHMS DFD 16/1-2)
Other (1969):   Scheduled
Earthwork Survey (1971):   George Jobey (Copies in RCAHMS DFD 266/1-2 P/CO)
Other (1973):   Resurveyed at 1:2500 by the OS
Other (1978):   Surveyed at 1:10.000 by the OS
Earthwork Survey (1980):   1:1000 (RCAHMS DFD 266/3 )
Excavation (1985):   Roger Mercer (forthcoming)
Earthwork Survey (1993):   Plan and description (RCAHMS 1997, 80, fig 73; RCAHMS DC32458 & SC1354839; DC32541 & SC381981)
Other (2010):   Re-Scheduled
Earthwork Survey (2015):   Rubicon Heritage on behalf of the Forestry Commission

Interior Features

At least 29 round-house stances visible

Water Source

Spring within the annexe on the SE

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

Surface

Ring-grooves

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:   SW entrance entred in two separate phases

Guard Chambers:  ✗

Chevaux de Frise:  ✗

Entrances:
1. Simple Gap (North east):   None
2. Hornwork (South west):   None
2. Passage-way/Corridor (South west):   Ramparts return around the terminals of the ditch

Enclosing Works

Stone-faced ramparts and ditches

Enclosed Area:
Area 1:   0.6ha.
Area 2:   0.4ha.
Area 3:   1.2ha.
Total:   1.2ha.

Total Footprint Area:  2.2ha.

Ramparts

None

Multi-period Enclosure System:
✓   Overall includes the annexe; the overall core is 1.2ha

Ramparts Form a Continuous Circuit:
✓   Excludes the annexe perimeter

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

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

The annexe also has twin ramparts with a medial ditch

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

Short lengths of timber work identified in Roger Mercer's evaluation trench at the WSW entrance. Packing stones for another palisade are visible in one of the linear earthwork. Ditches. Carbonised post found by Bell

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:
✓   Annexe also has a ditch

Number of Ditches:  1

Annex:
✓   The annexe encloses an area of 0.5ha within twin banks with a substantial medial ditch up to 6m in breadth against the outer defences of the fort on the SE. Its angular returns to the defences on the ENE and WSW, not only show that it is conceived as an addition, but the configuration of the angle at the WSW end to leave an entrance at the junction with a linear earthwork that approaches the fort from the N and swings round its SW end, clearly shows that the annexe was designed as part of the system of landscape enclosures that has been identified around the fort. At this entrance the tops of packing stones marking the line of a palisade can be seen protruding through the turf on the crest of the linear earthwork. A second linear earthwork that approaches the angle of the annexe at this entrance from the S, is cut through it and a radiocarbon date from the primary silts of the annexe ditch indicate its use in the Roman Iron Age. A third linear earthwork approaches the annexe from the ESE, where the broad entrance left between its terminal and the outer bank of the annexe was subsequently blocked with a short length of bank and ditch. There is also a broad entrance into the annexe on the ENE.

References

Bell, R (1895) My Strange Pets and Other Memories of Country Life. Edinburgh

Bell, R (1905) 'Forts and their connecting trenches in Eskdalemuir'. Trans Dumfriesshire Galloway Natur Hist Antiq Soc, 2 Ser, 17 (1904-5), 76-85

Christison, D (1898) Early fortifications in Scotland: motes, camps and forts: the Rhind lectures in archaeology for 1894. Blackwood & Sons: Edinburgh

Feachem, R (1963) A guide to prehistoric Scotland. Batsford: London (p 115-16)

Jobey, G (1971) 'Early settlements in eastern Dumfriesshire'. Trans Dumfriesshire Galloway Natur Hist Antiq Soc, 3 Ser, 48 (1971), 78-105

Mercer, R J (198a) 'Over Rig excavation and field survey, Eskdalemuir, Dumfriesshire, south-west Scotland', Univ Edinburgh Dept Archaeol Annu Rep 31, 19-22

RCAHMS (1920) The Royal Commission on the Ancient and Historical Monuments of Scotland. Seventh Report with Inventory of Monuments and Constructions in the County of Dumfries. HMSO: Edinburgh

RCAHMS (1997) Eastern Dumfriesshire: an archaeological landscape. HMSO: Edinburgh

Roy, W (1793) The military antiquities of the Romans in Britain, London



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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