Probably not needed but just to eliminate the other KELL family.
Marriage Qld.
1883/B8638
KELL Robert Allan
BURWOOD Emily
Births
1884/B33163   Kell   Lillian Emma   Robert Allan   Emily Burwood
1887/B38718   Kell   William Allan   Robert Allan   Eaily Burwood
1893/B52044   Kell   Alfred Edward   Robert Allan   Emily Burwood
1895/B56128   Kell   Bertram Thomas   Robert Allan   Emily Burwood
If Robert was working on a coastal trader then he was obviously home during some of that time. 

To eliminate the other KELL family on the WA electoral roll.
The KELL family in WA that included a widow Emily [husband Joseph] are in the Victorian Indexes having children at Richmond in the 1860's.
Marriage 1864
KELL Joseph
SHARP Emily   Reg Number 1091.
They had 10 children.
Joseph died in 1901 and Emily in 1925 and they are both buried in the same grave at Karrakatta.
K.