Cut Mark: Three Locks, New Inn   

Old B.M. on S.W. angle of New Inn, Three Locks [2GL] - approximate location only.

Location
Grid reference: SP 8906 2841.
Landranger 165: Aylesbury & Leighton Buzzard, Thame & Berkhamstead.
Structure: Pub / Hotel.
Waypoint: BM2559.

Neighbouring Bench Marks

BM	Bletchley, #123 Water Eaton Road 4.98km to the north.
BM	Bletchley, #37 Water Eaton Road 5.19km to the north.
BM	Bletchley, Water Eaton Road, east rly bridge 5.29km to the northwest.
BM	Bletchley, Water Eaton Road, west rly bridge 5.37km to the northwest.
BM	Bletchley, Milton Keynes Register Office 5.48km to the north.

The nearest fundamental bench mark is Great Linford, 14.51km to the north.

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 252.9480 feet [77.0986 metres] above mean sea level (Newlyn datum). It was included as a side level on the Great Linford to Hemel Hempstead levelling line. The surveyor's description was Old B.M. on S.W. angle of New Inn, Three Locks.