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1GL Bolt: Exeter, St. Thomas's Church 
Old B.M. (bolt) on S.W. face of St, Thomas's Church Tower, Exeter [2GL] =?= CUT MARK: ST THOMAS CH COWICK ST SW FACE (8.9245m ODN, 0.3m AGL).
Location
Grid reference: SX 9120 9180.
Landranger 192: Exeter & Sidmouth, Exmouth & Teignmouth.
Structure: Church.
Waypoint: BT0752.
Neighbouring Bench Marks
The nearest fundamental bench mark is Bridford,
11.32km to the southwest.
Second Geodetic Levelling, England & Wales (1912-21)
This bench mark was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 29.3110 feet [8.9340 metres] above mean sea level (Newlyn datum). It was included as a side level on the Bridford to Beer levelling line. The surveyor's description was Old B.M. (bolt) on S.W. face of St, Thomas's Church Tower, Exeter.
Location
Grid reference: SX 9120 9180.
Landranger 192: Exeter & Sidmouth, Exmouth & Teignmouth.
Structure: Church.
Waypoint: BT0752.
Neighbouring Bench Marks
| BOLT | Exeter, Cathedral 1.14km to the northeast. |
| BM | Leigh Cross Rail Bridge 8.54km to the southwest. |
| BOLT | Broadclyst, Church 8.84km to the northeast. |
| BM | Rail Bridge nr Teign House Inn 8.94km to the southwest. |
| BM | Bridford Mills Chapel 9.06km to the southwest. |
Second Geodetic Levelling, England & Wales (1912-21)
This bench mark was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 29.3110 feet [8.9340 metres] above mean sea level (Newlyn datum). It was included as a side level on the Bridford to Beer levelling line. The surveyor's description was Old B.M. (bolt) on S.W. face of St, Thomas's Church Tower, Exeter.
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