RWF 2nd batt. 6919 Lc/Cpl Charles H. Fellows

This is my first post on this site, and as I have looked through it has made compelling reading.:cool:
Hope someone may have or can help me find information / pictures of my Grandad Charles Henry Fellows.
dob 04/05/1884.
I know he served in India & France and his last rank was that of 2nd lieutenant. :cool:
He is thought to have left the army around 1920. Sadly he was not to remain with his wife and this is where I am stuck.
I have been trying for over 2 years to trace hime through all the usual BMD records but nothing matches, and of course I do not know what county he went to.
His wife when she remarried in 1953 at a good old age called herself a widow. How did she know, was it a slip. :confused:
Family seem to think she contested a will that he left so this, I think would still make them married. Still:confused:
SO 1920-1953 where was he? :unsure:
Did he keep in touch with other amy friends?
Did he belong to any old commerades clubs?
Would the RWF be notified of his death?
Although I think this unlikey, I still hold hope.
I have downloaded his medal card and it shows just the victory medal & british medal, if it would help to see a copy of it at all I will post it here.

Thanks for taking the time to read this post.