GRADE I † Early C13 chancel with trace transepts (BHO); C14 crossing tower; C15 south chapel and nave; restoration mid-C19 (Ferrey). A most unusual late C17 octagonal dial; 6m SW of Blandford Forum, just off the main road to Dorchester (12m). 50.8004 /  -2.234 / ST836001

VERTICAL DIAL C17

The remarkable vertical dial is located at the apex of the S Chapel gable. It dates to late C17 (BHO). The lines radiating from the top end of the gnomon are reminiscent of a scratch dial. The dial is canted for accuracy, and deeply enough to accommodate a rare E dial. Both gnomons are unusual, not least by being more toothed than merely serrated.

THE EAST DIAL

It is very unusual (and possibly unique) to bother to delineate the east or west edge of a canted dial; and really quite strange to use such a tall gnomon, which will only cast a shadow for an hour or two at most. JF / BSS

John Foad (BSS) kindly marked up a close-up of the E. dial to show how it would have worked. He writes: It should have diagonal hour lines on it, though there is probably only room for a couple, as it will only see the sun briefly around 6 each morning. There is a suggestion in the records that there were at one time 2 raised lines, but a magnified image reveals no surviving evidence.

GSS Category: Scratch Dial; Rare Dial; Canted Dial; East-facing sundial

All photos: Keith Salvesen. Thanks as ever to John Foad for his contribution.