MDE1281 - Longstone Barrow, Challacombe Common (Monument)
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Type and Period (1)
Longstone Barrow lies southeast of the Longstone, from which it gets its name.  There are traces of surrounding ditch at Longstone Barrow. A circular pit has been dug on top of the barrow. It is scheduled with two other barrows.  Longstone Barrow is a bowl barrow with a hollow in the top and enclosed by a ditch. It is 34 paces in diameter and 8 feet in height.  Longstone Barrow is located at SS 7072 4277. It is a ditched bowl barrow, 42.6 metres in diameter and 3.7 metres high. It has a large 0.9 metre deep central mutilation and the ditch is almost filled with peat marsh. Resurveyed at 1:2500. It is shown as very substantial on the 1979 NMR aerial photograph, which also shows the ditch and outer bank. [7,8] This is a Scheduled Monument, part of Devon 237 (The Longstone Barrow group).  Longstone Barrow is located at SS 7073 4277. This turf-covered bowl barrow, possibly the largest on Exmoor, is very prominently situated at about 475 metres above Ordnance Datum, on the western edge of a ridge containing at least five other large barrows. There are panoramic views; northwards to the Bristol Channel and the South Wales coast, eastwards to Wood Barrow and the Chains Barrow, southwards to Five Barrows, and westwards across to the Chapman Barrows, Barnstaple Bay and Hartland Point. It measures 34 metres east/west by 32.8 metres, and is 2.7 metres high. Some stone content could be felt on probing, but it is predominantly of earthern construction. The barrow appears to have been deliberatly constructed with a distinct change of slope about 1.6 metres high, some 5 to 6 metres in from its periphery. The centre has been robbed leaving an irregular hollow about 6 metres in diameter and 1.5 metres deep. The spoil has been dumped around the hollow forming a ring of material about 12.5 metres overall diameter and about 0.5 metres high, giving a false 'cap' to the barrow, which increases its original height of some 2.7 metres to 3.2 metres. A surrounding ditch, about 5.5 metres wide and 0.3 to 0.5 metres deep, is still evident around most of the circumference. It is best seen around the southeast, where its outer scarp is up to 0.7 metres high. The northeast quadrant is mainly silted up and there is a slight mutilation on the western rim. There is no evidence of an alleged outer bank on aerial photographs  as stated by Fletcher.  The Longstone Barrow and surrounding ditch is clearly visible on aerial photographs, partiularly the infra red photography taken for Exmoor National Park Authority in 1981. There is no trace of the alleged outer bank on the photographs examined as part of the Exmoor National Park National Mapping Programme, however, the NMR 1979 photographs referenced above were not available for the survey in 2008. [13-16] The Scheduled Monument Condition Assessment of 2009 gave the site a survival score of 0.  The site was surveyed in March 2015 as part of the 2015 Exmoor Scheduled Monument Condition Assessment. It was given a survival score of 7.  The barrow was subject to geophysical survey as part of a wider study of a group of monuments on Challacombe Common in June 2015. Magnetically, the ditch returned a negative response, suggesting it had been dug into magnetically sterile subsoil or geology with little enhancement from the surrounding area to produce a response. The results also suggest that the original barrow mound was later enlarged and enhanced at a later stage. This is perhaps a togographic affect as the mound has a clear shoulder. 
- <1> SEM6752 Article in serial: Chanter, J.F. + Worth, R.H.. 1905. The Rude Stone Monuments of Exmoor and its Borders. Transactions of the Devonshire Association. 37. I. P.387.
- <2> SEM6797 Article in serial: Worth, R.H.. 1905. Twenty-Fourth Report of the Barrow Committee. Transactions of the Devonshire Association. 37. P.94.
- <3> SEM7441 Index: Ordnance Survey. Ordnance Survey Archaeology Division Record Card. SS74SW11.
- <4> SEM7190 Map: Ordnance Survey. 1902-1907. County Series, 2nd Edition 25 Inch Map. 1:2500.
- <5> SEM7220 Map: Ordnance Survey. 1962. 6 Inch Map: 1962. 1:10560.
- <6> SEM6798 Article in serial: Grinsell, L.V.. 1970. The Barrows of North Devon. Proceedings of the Devon Archaeological Society. 28. P.115.
- <7> SMO5103 Unpublished document: Ordnance Survey Archaeology Division Field Investigators Comments. MJ Fletcher 19 September 1974.
- <8> SMO4068 Aerial photograph: Various. Various. Vertical Aerial Photograph. NMR SS7042:SF 1460/30,39 (7 March 1979).
- <9> SEM7406 Unpublished document: McDonnell, R.. 1980. Gazetteer of Sites in the Exmoor National Park Identified through Aerial Photography. Gazatteer Number: SS7042b.
- <10> SMO4073 Index: Scheduled Monument Notification . Dept of the Environment 1987, County List of Scheduled Ancient Monuments: Devon 15 County No.237.
- <11> SMO7324 Unpublished document: Sainsbury, I.S.S. Field Investigators Comments. RCHME Field Investigation.
- <12> SMO7267 Technical drawing: Selected Barrow Profiles: Chapman Barrows, Longstone Barrow, Five Barrows. Pencil.
- <13> SMO4068 Aerial photograph: Various. Various. Vertical Aerial Photograph. Exmoor National Park Authority MAL 4974-75 (16 August 1981).
- <14> SEM6707 Aerial photograph: Royal Air Force. 1946 -1948. Vertical Aerial Photography. RAF/CPE/UK/1980.3086 (April 1947).
- <15> SEM7408 Aerial photograph: Meridian Air Maps. 1977-1978. Infrared False Colour Aerial Photography. MAM/13/118 (May 1977).
- <16> SEM7171 Aerial photograph: Griffith, F.. 1980s-1990s. Oblique aerial photographs of the Devon part of Exmoor National Park. DAP/QO 6, 7 (26 March 1990).
- <17> SEM7402 Report: Bray, L.S.. 2010. Scheduled Monument Condition Assessment 2009, Exmoor National Park.
- <18> SEM8278 Report: Gent, T. and Manning, P.. 2015. Exmoor National Park Scheduled Monument Condition Survey 2015.
- <19> SEM8313 Report: Adcock, J.. 2015. Geophysical Survey Report G1515: Challacombe Common, Exmoor National Park.
|Grid reference||Centred SS 7072 4276 (42m by 42m) (Estimated from sources)|
|Civil Parish||CHALLACOMBE, NORTH DEVON, DEVON|
Related Monuments/Buildings (0)
Related Events/Activities (3)
Related Articles (1)
External Links (1)
- http://www.pastscape.org.uk/hob.aspx?hob_id=35355 (Original Monarch entry: 35355)
- Devon SMR Monument ID: 657
- Devon SMR: SS74SW/5
- Exmoor National Park HER Number (now deleted): MDE20022
- Exmoor National Park HER Number (now deleted): MMO96
- National Monuments Record reference: SS 74 SW11
- National Park: Exmoor National Park
- Pastscape HOBID (was Monarch UID): 35355
- Scheduled Monument (County Number): Devon 237
Record last edited
Jun 1 2016 9:22AM
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