Other researchers online:
https://www.bnl.bm/2011/08/29/bermuda-history-genealogy/comment-page-4/"Robert William Duncan who, according to his marriage certificate was born in Somerset, Bermuda in June 1885. His parents names were John Duncan and Margaret Duncan (nee McGrath).
and:
https://www.bnl.bm/2011/08/29/bermuda-history-genealogy/comment-page-5/ "I ordered this from Bermuda many years ago and it arrived but when I contacted them recently for more info they had no trace of this birth certificate......My grandfather was born in Sandy’s Parish Bermuda on 4 June 1878 to a father listed as Duncan Brown a sapper in the Royal Engineers and mother Margaret Brown nee McGrath or MaGrath.
WW1 record
Joined the AIF 18 Aug 1914
Enlisted: Blackboy Hill, Western Australia
Robert William Duncan
Age 29 years, 2 mnths (4.6.85)
Occupation: Clerk
Born Ratheslathe, London Surrey
(is this meant to be Rotherhithe?)Sister: Ruby Duncan, 88 Great Howard Street, Liverpool, Lancashire
Had served 2½ years in RAGA (WA)
Description: 5',11¾", blue eyes, brown hair, fair complexion, Roman Catholic
Honorably Discharged Egypt 1916
A note re conditions of Discharge saying, the Army wouldn't be paying for his return "home"
How and when did he return to Australia?
RAGA
Royal Australian Garrison Artillery
So the AIF record indicates he was in Australia at least from around 1911 or so?
I couldn't find 88 Great Harwood - in any census near 1914.
Cheers
AMBLY