Uploader's Comments

This 1GL benchmark & bolt located on SW face of the former Pencaenewydd beer-house was used during the Ordnance Survey's First Primary Levelling on the line between Warrington and Pembroke Docks, between September 1851 and July 1852. This was mark No. 373 along this levelling line and was 391.9150ft above the Liverpool datum. The Ordnance Survey database shows that this mark was last inspected in 1973.