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OSBM Bolt: under Milk Wood 
OSBM Bolt on concrete bank, 141' S from S side of Bye Road, E side of road [3GL] - probably replaced in 1984 by new Bolt nearby.
Location
Grid reference: TQ 4421 2873.
Landranger 187: Dorking, Reigate & Crawley area.
Landranger 198: Brighton & Lewes, Haywards Heath.
Structure: Unknown.
Waypoint: OS0700.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Alfriston,
28.55km to the south.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Croydon to Alfriston levelling line. The surveyor's description was OSBM Bolt on concrete bank, 141' S from S side of Bye Road, E side of road.
Location
Grid reference: TQ 4421 2873.
Landranger 187: Dorking, Reigate & Crawley area.
Landranger 198: Brighton & Lewes, Haywards Heath.
Structure: Unknown.
Waypoint: OS0700.
Neighbouring Flush Brackets
| 2583 | Ford's Green 1.46km to the south. |
| 2584 | Pippingford Park Lodge 1.63km to the north. |
| 2585 | Lewes Park Side, Beeches Cottage 3.24km to the northwest. |
| 2547 | Old Forge Farm 3.35km to the southeast. |
| 11456 | Coleman's Hatch, Church 5.15km to the north. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Croydon to Alfriston levelling line. The surveyor's description was OSBM Bolt on concrete bank, 141' S from S side of Bye Road, E side of road.
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