William Druary Dowers was born in London his father James Theophilus Dowers, and Mary Caroline Druary. (a web site say birth 6/5/1838)
He died 1921 Collingwood
Catherine Kerr was born in Glasgow, her parents Peter Kerr and Margaret Hamilton. Catherine died 1881 aged 30 at Sandridge Victoria
They married 1868 in Victoria
Their children: Margaret 1868, Caroline 1870-1871, James 1871, Peter Charles 1874-1875, William Hamilton 1880-1881.
You have William Hamilton birth as 1860 but on official site it is 1880. Catherine would have been born abt 1851 so
she would not have a child at age 9.
Hope this makes sense and helps