‘Scratch’ sundial. This hand carved sundial is on the southern side of a 17th century building on the Althorp Estate. A wooden rod (gnomon) would have been placed in the middle for the shadow to cast its reading. Also called Mass dials. © Photo and caption from Adey Greeno, Conservation Manager at Althorp #Althorp #Althorphouse #Spencerfamily #althorppark #heritage #northamptonshire #sundial #conservation