Albert Ernest JOHNSON , –
There was also a Mary Ann Johnston (with a 't') living at the same address at this time. There was also a Oswald Richard and Christine Vera Johnston living in the same street - no number.
This may be their marriage reference:
6784/1930 JOHNSON ALBERT E SAYERS RUBY L KOGARAH
but it is well after when their son Albert Ernest was born in about 1917.