According to research I have done re the families who lived on Nore and Bishops Marshes (which I had hoped to attach somehow to this reply to save myself writing it all out yet again) both marshes were inhabited from from 1841 census to 1901 census but I could find nothing for the 1911 mentioned anywhere (if anyone comes across that the info would be useful for me). There used to be a track or roadway from Cooperhouse Lane, over Copperhouse marsh with, I suppose, a causeway across to Nore Marsh. This I know for a fact because my mother would go out there with my Great grandfather, John Mudge, before WW2 when he took his sheep out to graze, presumably in the summer months. East Court Farm had the grazing rights on those marshes. Comparing the two maps I have (Cassinni 1805/1819 Os & OS circa 1957) with the same area on Google Earth one can see the disappearance of the Marsh land in that period - most of that possibly by 1953 Surge tide of the great Storm. There does not appear to be any causeway connecting Nore Marsh to Bishops Marsh so can only conclude that a boat was the main transport across that part unless you waited for low tide.
On Bishops Marsh in 1841 Samuel Buddle, a shepherd, lived there with his wife and in 1851. John Stevens, Shepherd & his wife both from Berkshire - that must have been a shock! In 1861 John Potter, foreman of the cement works, was there with his wife and son.
Fort Darnet appears in the 1871 census with 63 yr old Henry Robus, watchman with his wife. On the nearby Isle of B...ty (cant make that out) 5 adults and 6 children are living.
1881 Edward Booley, a coporal in the Coast Brigade R A is there at Fort Darnet with his wife and 2 small children together with 4 Gunners of the RA. There is also a PUBLIC house with John Wadhams, Liscensed Victualler and shepherd with his daughter and 4 grandchildren.
1891 has Bombadier Robert Shaw in charge of the Fort with his wife and 4 Gunners of the RA, one of whom also has his wife, child and a visitor.
In 1901 Bombadier, Royal Garrison Artillery, Thomas Pougher, his wife, another bombadier and 10 gunners of the RA. The pub appears to have closed.
It may interest you to know that from 1841 - 1871 William Fry and his descendents lived on Nore Marsh and that members of that family were still in the East Court /Twydall/Lower Rainham areas untill after WW2.