Possibly a side track
NSW Electoral Roll 1913
DRUMMOYNE, polling at Mortlake
Margaretta WILLCOCKS domestic duties, Cabarita Rd,
Percy Harding WILLCOCKS, labourer, Cabarita Rd
NSW ER 1903
PARKES, polling at : Drummoyne, Five Dock, Dobroyd,
NONE with surname Wilcox, Willcox, Wilcock, Wilcocks, Willcocks
Cheers, JM