This is a detailed image of one of the sets of metal sacrificial samples that have been placed on Clarence. Four ferrous alloy plates were manufactured. Each iron alloy sample plate consisted of two cast iron and two mild steel coupons in order to mimic as closely as possible the corrosion behaviour of historic cast and wrought iron. One of each type of metal coupon was wrapped in the same geotextile used to wrap the artefacts to qualitatively ascertain its protective effect on the artefacts after reburial. The coupons were then attached to a high density polyethylene plate (15 cm length; 10 cm height; 2 cm width) by cable ties and connected to the base of a 1 m length of polyvinyl chloride (PVC) pipe (50 mm diameter) with a nylon nut and bolt.