My grandfather died in France during the Great War. I have a copy of a letter written to his widow by his nurse in 1917 just after he died. I have been wondering if it would be possible to find out more about her; she signed her name as 'M Bannister Sister in Charge'. I have looked at the National Archives but there are three possibilities. Unfortunately as I don't know our nurse's first name I don't know if it is likely I can find out more.