Cut Mark: Southampton, Portland Terrace   

Old B.M. on S.E. angle of building, at junction of Portland Terrace and Havelock Road [2GL] - approximate location only.

Location
Grid reference: SU 4179 1207.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
Structure: Unknown.
Waypoint: BM0002.

Neighbouring Bench Marks

BM	Southampton, Police Station 199.25m to the north.
BOLT	Southampton, St. Michael's Church 784.47m to the south.
BOLT	Southampton, West Gate 860.06m to the south.
BM	Southampton, French Street 1.06km to the south.
BM	Southampton, Mortuary 1.19km to the south.

The nearest fundamental bench mark is Southampton (O.S.O.), 781.86m 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 50.9060 feet [15.5161 metres] above mean sea level (Newlyn datum). It was included on the Southampton to Tide Gauge, Town Quay, Southampton levelling line. The surveyor's description was Old B.M. on S.E. angle of building, at junction of Portland Terrace and Havelock Road.