Hi Dee,
This is an interesting puzzle. The arrivals on the
Ocean Chief have been indexed up to surnames starting with the letter K and the Gregorys do not appear. If you have a look at the Tasmanian families database at
http://portal.archives.tas.gov.au/menu.aspx?search=8 you will see that there were 10 children's births registered in Tasmania. The first child listed is James, but this is from a death registration which gives his place of birth as England (making 11 children altogether). This would be the child they brought out, and there is a birth registration at Camberwell in 1854. I wonder if the child died during the passage? There is also mention that they arrived on the
James Baines. The only problem is that the
James Baines did not make it's maiden voyage to Australia until 1855, arriving in Melbourne on 12 Feb - it did not go to Tasmania, and they do not appear on that passenger list either. The confusion may be because the
Ocean Chief was owned by James Baines and Co. I suggest that you go over to the Australian board and post an enquiry - you might find someone who can help with more details.
http://www.rootschat.com/forum/index.php?board=165 You can also read a digitized copy of James' will at the Tas archives site mentioned above.
If you haven't already had a look, newspapers at
http://newspapers.nla.gov.au/ndp/del/home have lots on James and family, including the announcement of his father's death in England in 1872, and his sister's death in 1899. (Just use "James Gregory" as your search term).
Debra