According to the electorals (again!), James Brown and Martha (Brown) were together by the end of the war (perhaps not surprising).
It appears that when/if the 1921 census is released you will find Martha still living at 31 River View, Chopwell!
1931 has them at the aforementioned Landsale Houses, Ryton. Also Martha Isabella Bell.
An oddity
Mention in the newspapers
preview of Mrs Colthard, 31, River View, Blackhall Mill, Hamsterley. She had received word that her husband Jacob had been wounded in 1915. He was in the Royal Navy, and died. Name is actually Coulthard
Jacob Coulthard (1884-1915)
http://www.durhamatwar.org.uk/story/13363/So, I thought, the boarding house was still going strong (I'm sure it was!)
But if Jacob born 1884 was married, there is only one possible in the indexes
March 1913 Gateshead 10a 1586
Coulthard, Jacob - spouse Turner
Turner, Martha - spouse Coulthard
So which Martha Turner is that?