W tower, N face, 2nd storey, stone 1.
Image of the feature "III. Exterior Features: 3. Exterior Decoration: d. Miscellaneous: Chevron voussoir" at Cambridge.
by Ron Baxter.
On the N wall of the tower, E of the rectangular second storey window, a chevron voussoir consisting of a single centrifugal roll with cogwheel edge.