Inferred magnetic field angles for the north-west relic in Abell 3667, after correction for Faraday rotation (which is shown in Fig. 1). Blue contours show the full-resolution (7.5″ × 7.4″) Stokes-I MGCLS intensity, with the synthesised beam shown in the boxed region on the lower left. Contour levels are 10, 20, 40, 60, 80, 100 × 1σ, where σ = 6.7 μJy beam⁻¹. Magnetic field vectors (angles only) are shown where the linearly polarised intensity is > 8σ. The magnetic field is highly ordered along the NW edge of the relic.