Bit More,
Have not yet searched 1903 NSW roll BUT can do so, just need to determine the various possible electorates to then search polling place by polling place online. The following is from a different but commer site online.
Qld Roll 1913 indicates Bertram Henry Nevill at Oxley, grocer.(Line 1147, Seat of Oxley, polling place Sherwood)
Qld Roll 1919 indicates Bertram Henry Nevill at Oxley, grocer (cannot read line, image issues, but same as above) AND ALSO on same roll, immediately under (ie alpha order) Joseph Harold Nevill, at Clivedon Ave Oxley, a leather goods manufacturer.recently enrolled – hence street address "see edit below
Qld Roll 1925 indicating change address for Bertram Henry Nevill, occupation “traveller”, at Griffin’s, Munro St, Auchenflower, (line 5650, seat of Brisbane, polling place Toowong).
NSW Electoral Roll 1936 indicate Bertram Henry Nevill and Emilie Nevill at 27 Victoria St Carrington in 1936. He was a commercial traveller, she home duties. (lines 1297 and 1298, Seat of Newcastle, polling place Carrington).
Joseph Harold Nevill - not found on later rolls, only that one. EDITED TO ADD - unsighted on other rolls to 1936, if there were two lads named Joseph Harold Nevill or was the Lad fallen at Fromelles enrolled by others not yet aware of the Fromelles fate for this lad, roll may have been issued late 1918 perhaps
Just Moi