©Si Barber Moral Rights Asserted   Bob Davey, restorer of St Mary's Church, Houghton on the Hill, Norfolk which contains the country's earliest painting of the Holy Trinity. Mr Davey spent twenty years conserving the church and has protected it from vandals and 'Satanists' but fears that unless younger people come forward to take his place to maintain stewardship of the building. Picture shows - Depiction of Bible passages.