Monument record 0014002000 - GRIM'S DITCH, BEAMANGREEN WOOD


Iron Age or Saxon linear earthwork called Grim's Ditch evaluated in trial trenching and seen in watching brief.

Protected Status/Designation

  • Planning Notification Area: Late Prehistoric linear earthworks of Grims Ditch


Type and Period (4)

  • BOUNDARY BANK (Early Iron Age to Late Iron Age - 700 BC? to 42 AD?)
  • BOUNDARY DITCH (Early Iron Age to Late Iron Age - 700 BC? to 42 AD?)
  • BOUNDARY BANK (Saxon - 410 AD? to 1065 AD?)
  • BOUNDARY DITCH (Saxon - 410 AD? to 1065 AD?)


Dimensions - Length 1060m, Height 1m.
Plan Form - Linear.
Section (1 of 2) of Grim's Ditch. Bank is c.4 feet above 30 feet wide ditch (B1).
Marked between NGRs (B2).
Bank of varying height. Ditch on E side. Well preserved in wood. At N end ditch infilled & under a road. Bank used as entrance to Grymsdyke House. Bank still 3-4 feet high (B3).
Trackway widened for new road (B4).
Archaeological evaluation at RAF High Wycombe close to line of Grim's Ditch failed to produce any archaeological evidence of the earthwork or associated activity (B14).
4 profiles across earthwork recorded in February 1999 by Network Archaeology (B18).
Scheduling revised 9th September 2003, SAM No.35332 (B4).
Watching brief carried out by Oxford Archaeology in June 2008 during service trenching across the line of Grim's Ditch recorded the ditch surviving as a cut 7m wide and over 0.8m deep (not bottomed), with gentley sloping sides. 2 layers of silty clay fills 0.15m thick and 0.3m thick were visible. The upper part of the ditch had been severely truncated by the construction of the modern road by up to 0.6m in places. Immediately to the north a shallow ditch 2m wide and 0.2m deep appeared to predate Grim's Ditch and may represent a truncated pallisade trench or possibly a tree-throw hole. No finds or dating evidence was recovered. See report for detail (B27).

Sources (9)

  • <1>SBC12738 Bibliographic reference: RCHM BUCKS 1 P62/VCH BUCKS 3 P35.
  • <2>SBC10400 Map: Ordnance Survey. 1960. OS 1960 6-INCH MAP. 1:10,560.
  • <3>SBC13972 Scheduling record: English Heritage. 2003. SCHEDULING LISTS OF INSPECTORATE OF ANCIENT MONUMENTS.
  • <4>SBC4964 Bibliographic reference: FARLEY M E AUTUMN 1982.
  • <5>SBC8255 Unpublished document: W L Matthews & Angus Wainwright. 1990. THE NATIONAL TRUST ARCHAEOLOGICAL SURVEY: BRADENHAM.
  • <14>SBC19079 Unpublished document: Oxford Archaeological Unit. 2001. 'F-Block', RAF High Wycombe Bradenham, Buckinghamshire.
  • <16>SBC19564 Unpublished document: Buckinghamshire County Museum Archaeological Service. 1997. An Archaeological and Management Survey of Grim's Ditch, Buckinghamshire.
  • <18>XYSBC19566 Unpublished document: Network Archaeology. 1999. Grim's Ditch Archaeological and Management Survey Phase III. pp4,10, Appendix 2, Figs2,3,20,21. [Mapped feature: #46116 ]
  • <27>SBC23143 Unpublished document: Oxford Archaeology. 2008. Grim's Ditch, RAF High Wycombe: Archaeological Watching Brief Report.


Grid reference Centred SU 82830 99202 (436m by 1078m)
Civil Parish LACEY GREEN, Wycombe, Buckinghamshire
Civil Parish BRADENHAM, Wycombe, Buckinghamshire

Finds (0)

Related Monuments/Buildings (1)

Related Events/Activities (2)

  • Event - Intervention: Evaluation (EBC15907)
  • Event - Intervention: Watching brief (Ref: BRGDHW 08) (EBC17094)

Record last edited

May 22 2022 3:40PM

Comments and Feedback

Do you have any questions or more information about this record? Please feel free to comment below with your name and email address. All comments are submitted to the Heritage Portal maintainers for moderation, and we aim to respond/publish as soon as possible. Comments, questions and answers that may be helpful to other users will be retained and displayed along with the name you supply. The email address you supply will never be displayed or shared.