Just to help RChatters following this thread :
Not sure, but from 1870 NSW Electoral Roll for Central Cumberland (ie covering the police districts of Parramatta and of Liverpool)
Edward Clarke, leaseholder near George's Hall
There's several chaps surnamed CHILDS and they are all in the Holsworthy area ... Moorebank, Mills Creek, etc
1878 NSW ER, Central Cumberland
Edward Clarke, leasholder near George's Hall
and again several surnamed CHILDS in the Holsworthy area
1903 NSW ER Parramatta Electorate, Liverpool polling place
CHILDS, Sarah Ellen, domestic duties, living "near Liverpool"
However, no Arthur Sydney CLARKE at that polling place. My copies of those early rolls are NOT keyword searchable, sorry....
I've also had a look for possible inquests for Eliza Clarke or Sarah McCartney in 1891 .... cannot find any noted in my records ....
Cheers, JM