S nave, wall, sawtooth string course, detail.

Image of the feature "III. Exterior Features: 3. Exterior Decoration: a. String courses: Nave" at Cambridge.

by Ron Baxter.

Running around the nave at the level of the N and S window sills (which is the same as the imposts of the nave doorways) is a double chamfered string course with two rows of sawtooth on the face and one on the lower chamfer.