Confederate counterattacks, however, succeeded in recapturing the breastwork positions. A breastwork with cannon lined the island's riverbanks. "Vixen" was an armoured gunboat of the breastwork type. When Sullivan sent several regiments to scale the ravine, they fell back to a breastwork. They also constructed three small v-shaped trenches between this dirt wall and Prescott's breastwork. Reed proposed to overcome this risk by the addition of an armoured breastwork. To the northwest lie Holne and Scorriton on the southern breastwork of the Dartmoor upland. Alerted by the noise of battle, the rebels manned the breastwork. The sides of the breastwork were plated with 14 inches of armour. He ordered his men to construct a breastwork from nearby logs and brush. Some heavily trampled breastwork is still visible in the woods by the train tracks. A man-made breastwork of sand with timber posts was found from this area. Also charred remains of buildings, which some were linked to the breastwork, were also found. Neither the manor house or the breastwork supported each other. They also had to withstand the first wave of attacks when defending a breastwork.