Dear Judy,
Thanks for your response. It may be of no relevance to you at all, but
JACKSON, James and wife (Mary) Ann (nee McLEASH?) , are listed as passengers on the ship JOHN, departed Gravesend on September 12th, 1839
with Captain Alexander Smith,
arrived Port Adelaide South Australia on February 5th, 1840.
My ancestor WOK Dent is on the same passenger list, but according to Bgor (see RootsChat), there appear to have been transcription errors from the original records and it is probable that WOK Dent arrived a few months later on the ORLEANA. Working on the basis that ships are floating villages and that the members of the village may have known each other prior to boarding, the Jackson-Dent connection may be relevant.
Regards,
Lindsay.