Foulness Island level, which was above the danger level for this part of the Essex coast. This level in itself was not a danger to the island, as the sea walls had been raised and strengthened between 1951 and 1952 by the War Office, and were above mean sea level. However, the high water was accompanied by strong winds, creating large waves, which broke over the top of the defences, washing away the earth banks on the inland side of the walls. Two sections of the wall breached, from Rugwood Head to Asplin's Head on the eastern side of the island, and
Foulness Island below the island, and a well was constructed on Great Shelford Marsh. It reached a depth of , but no water was found. At the end of the 1700s, Francis Bannester, who owned Rushley Island nearby, attempted to find water by boring, but again failed to do so. However, his son, also called Francis, persisted and found fresh water some below Rushley in 1828. Just six years later, there were more than 20 such springs scattered through the six islands of which Foulness is one, and fourteen farms on the island had their own wells by 1889. Evidence for housing