I am assuming that you know that there were others of the CRAVEN family also in Queensland at around the same time, and there is a death record for a Fulwar Guy CRAVEN as late as 1964.
I've not followed them very far as I thought you may not need the information but, according to an Ancestry tree, they appear to be descended from
Fulwar Craven (of Brockhampton Park), 1782–1860
Born: 25 JUN 1782 • Barton Court, Kintbury, Berkshire, England
Died 14 APR 1860 • Northleach, Gloucestershire
Buried Brockhampton Park, April 21, 1860
Judith