Hi Ted
Your query prompted me to look at this family again.
George and Susan continued to have children after they arrived in New Zealand. They had at least 12 in total, the last I have found was born on 7 Feb 1880.
Susan was buried in Addington Cemetery in Christchurch in Sep 1923 but I have no record of George's demise. He possibly died in Dec 1906 but I have no firm evidence about that. He may also have been working as the verger of St Mary's Church in Addington Christchurch at the time of his death. I had a look around Addington Cemetery but Susan's grave is now unmarked the records show a William Downing buried with Susan who is the right age to be George so I suspect it could well be a transcription error and this is where George is buried. There is a record in 1907 from Church minutes saying Mr G Downing had died so a new Verger had been hired.
As to his occupation in 3 of his children's marriage certificates his occupation is listed
In 1879 as a labourer then in 1884, 1885 listed as a gardener so a Verger sounds about right too.
If you would like the details of the children perhaps personal message is the best way to proceed - if you send be your email address I can scan what I have and send it to you.
Liz