Here is a link for the crew and passengers for the "Julia Ann" when she arrived in Sydney on July 24, 1855.

http://mariners.records.nsw.gov.au/1855/07/059jul.htm

Somehow, the First Mate, Mr. Coffin, has lost 20 years in age! Here is the original document:

http://mariners.records.nsw.gov.au/1855/07/media/059jul.gif

It says that the nationality of all of the crew members is "American".