Fellow researchers ...
I've got kind of a detailed query (without any actual details) so please bear with me ...
Just looking for some advice on how to proceed ...  

I recently was sent a picture from a relative, of a woman in her mid 40s (ish), Victorian dress, no name, just the description that follows ... I am guessing the picture was taken in the 1890s.
"Niece of P.Furlong of Duncannon, 
all killed in Coventry Blitz".
No name, no address, no anything.  I am wondering where to go to start trying to identify this woman - the P.Furlong mentioned was my gr. grandfather and Duncannon is my home town in Ireland.
I've tried a few places regarding casualties of the Blitz during WWII and nobody of the name "Furlong" is mentioned.  She would have had to have been (A) a descendant of my gr.grandfathers brother (whom I cannot trace)  (B) or of his sister (whom I also also cannot trace) or (C) given the dress, his sister herself.   
All help and / or pointers appreciated.