The final part of this three-part post looks at the history of the defences at Freiston Shore. Beware, its text heavy! Frieston Shore is located on the west side of the Wash, on the stretch of coast between Boston and Gibraltar Point. A sea wall, which was an earth bank averaging 6 feet in height and 5 – 10 feet wide at the top, ran between the flat low lying land to the west and the saltings – a belt of marshy grassland intersected by numerous large and small dykes – to the east. To the east of the saltings are the sands, through which the navigable Boston Channel ran. The sea only reached the bank normally at Springs and Neaps. At low water, the tide went out some two miles in places. At high water, the saltings were covered with between 2 to 4 feet of water. The bank formed a natural defensive feature to command the beaches. The hinterland was some 7 feet below sea level and in places intersected by numerous drains which were effective anti-tank obstacle...