https://coflein.gov.uk/en/legals/ CC BY NC ND Maritime Site/monument Archaeology Data Service https://ariadne-infrastructure.eu/aocat/Agent/Archaeology%20Data%20Service Royal Commission on the Ancient and Historical Monuments of Wales https://ariadne-infrastructure.eu/aocat/Agent/Royal%20Commission%20on%20the%20Ancient%20and%20Historical%20Monuments%20of%20Wales Noted as a hazard in the Wye in the approach to Chepstow - 'It is necessary in going up river towards Chepstow to avoid Tideham stone, which has 6 feet over it when Fair-tide rock at Red cliff is covering; the stone lies abreast Ewen's rock, upon the port hand, near to an oak tree on Thornwell's farm.' LiDAR data suggest a small hump on the mud flats, which is shown with vegetative cover on modern aerial photography. Sources include: Admiralty; 1884, Sailing Directions for the Bristol Channel, 4th Ed, pg149, 155 Environment Agency All Wales LiDAR, 2m resolution, 2012 Historic Admiralty Chart 2862-A10, RCAHMW Digital Collections sourced from the UK Hydrographic Office and published in 1860 Maritime Officer, RCAHMW, September 2014. en https://ariadne-infrastructure.eu/aocat/Resource/RCAHMW/15D9E1AE-D86E-3A5B-ABA2-34A2BA14F9AF https://ariadne-infrastructure.eu/aocat/Collection/RCAHMW/8D520B07-78F5-3A8E-AD61-580FCFF7218E 2023-09-07 https://coflein.gov.uk/en/site/544103/ en 2018-05-17 seascape https://ariadne-infrastructure.eu/aocat/Concept/ADS/SEASCAPE 544103 Royal Commission on the Ancient and Historical Monuments of Wales https://ariadne-infrastructure.eu/aocat/Agent/Royal%20Commission%20on%20the%20Ancient%20and%20Historical%20Monuments%20of%20Wales Royal Commission on the Ancient and Historical Monuments of Wales https://ariadne-infrastructure.eu/aocat/Agent/Royal%20Commission%20on%20the%20Ancient%20and%20Historical%20Monuments%20of%20Wales dataset https://ariadne-infrastructure.eu/aocat/Concept/AO_Type/provided%20record Royal Commission on the Ancient and Historical Monuments of Wales https://ariadne-infrastructure.eu/aocat/Agent/Royal%20Commission%20on%20the%20Ancient%20and%20Historical%20Monuments%20of%20Wales Maritime, Maritime, Maritime 51.619363 -2.6607934 51.619363 -2.6607934 1540 post medieval 1901 http://n2t.net/ark:/99152/p0kh9dsctsj <text>Tideham Stone</text> <language>en</language> post medieval 2014-10-05 http://www.wikidata.org/entity/Q25 Wales https://ariadne-infrastructure.eu/aocat/Concept/AO_DataType/Structured%20Data 4c62c1eac0de608a46b0c41f426421f9d51937882d3b6912fceec28046f3d913 bd12a089cd536af1bcdbdb9a5d81a6124cc95de1f3cfe4788da9ba3599105c39 Site/monument <language>en</language> <text>STRODE MILL</text> ca24ed80ddf4a83881c2fa6e3608e6a57d2cdd8e5ca803042bb9ac5ba23f6796 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Heritage Post Medieval (en) United Kingdom