I think the OP is referring to Captain George Ward Hunt and Private Frank Norman Sweet, service number 9042, who were both killed in action while serving with the 2nd Battalion of the Northhamptonshire Regiment on Sunday, 9 May 1915, at the Battle of Aubers Ridge.
I'd suggest that you're probably looking for local papers in the Northhampton area, the British Newspaper Archive and presumably also Findmypast seem to have a collection of local papers from Northampton for the right time period.
Having said that, CWGC indicates that his mother was Mrs Kate Florence Miller, living at 1 Millman Place, Bedford Row, Holborn, London. Where was he born and brought up?