BRIDOL is the British Sundial Society's Register of Fixed and Mass Dials, which gives detail and photographs of about 8000 fixed sundials and 3000 mass dials in the UK.
Some of these are in private gardens, but the majority are publicly available.
A large square block with roll mould at the corners and chamfered top, 3m east of the south gate of the churchyard, supports a smaller block with ornamental margin and a dated incised sundial.
Ref: A F Donnelly "Parishes of Hartburn" pp 11 & 18
Ref: https://historicengland.org.uk/listing/the-list/list-entry/1042119
