IGI has this baptism which is an extracted entry so is reliable.  it looks a possible ....................
         
EDWARD MITCHELL   
Born: 18 JAN 1814     
Baptism :21 NOV 1817     Saint Phillips, Birmingham, Warwick, England
Parents: Robert MITCHELL, Elizabeth
 
This couple had 2other children baptised on the same date:   
Emma MITCHELL, born 24 OCT 1817 
Henry MITCHELL, born 26 OCT 1815 
Other children also which have same parents listed, and at same church:
Elizabeth - born 05 JUL 1810, baptised 15 OCT 1812 
Thomas - born   25 APR 1812, baptised  15 OCT 1812 Saint Phillips, Birmingham, Warwick, England 
Charles, baptised: 21 JUN 1809 
What other information is on the death cert - children and wife's names?  Does it say how long he was in Victoria?
Judith