I Am Looking for Information on Edward Stephens and Family Who Had a Son William Luke That Came to Australia IN the Mid 1800s

Edward STEPHENS appeared in the 1841 Cornwall census. His son William Luke STEPHENS married Anne Tippet DENITHORNE in (1854?) and migrated to Australia. They are both registered as having been buried at Tower Hill near Warrnambool in Victoria.
Any information would be appreciated.