Brushy Creek is part of the County of Evelyn. I searched for births at Evelyn found 1, this led to the following which seems to match the family re- location, 6 children, (1 had died), (No more children after 1873). (Not confirmed though)
Michael SMITH born, father Michael, mother Mary MCNAMARA,birth place Evel (Evelyn) in 1863 (#8731)
John SMITH born, father Michael, mother Mary MCNAMARA, at MOOR in 1863 (#2946)
James SMITH born at YERI in 1865 (#3161)
Thomas SMITH born LDALE (Lilydale) in 1866 (#22207)
Edward SMITH born MOOROOLBA in 1866 (#24224)
Edward Thomas SMITH born father same, mother recorded as Mary MCNAMARE, birth at LILY (Lilydale) in 1871 (#24204)
Patrick Daniel SMITH same details as line above, birth at LILY (Lilydale) in 1872 (#24215)
Death of baby Thomas looks as though he died at 2days of age, death 1866, father Michael, mother Mary U at MOOR (#10837).
Marriage of Michael SMITH to Mary MCNAMARA in 1861 (#1584)