Hello Ann - hope you had some luck with your search. I have just started looking for Theophile Jules Saunier, who I think is the same person. He migrated from Le Havre in France in 1857. He sailed on the "Nuremberg" and arrived in New Orleans on 21 April 1857. The friend I am helping with this search, states TJS junior, is her great grand father, who came to Australia in late 1870's and settled in Goolwa, South Australia. He past away 16 June 1917, leaving his wife and 6 children. My email address is colinmorgan1@optusnet.com.au.
Hopefully we can help each other.
Best wishes, Colin