Thanks all - I do have a membership in Ancestry.com, but because of problems with the surname - Vordick, Vaadock, Verdict, Fordyk and several other variations - I can't seem to find the immigration info, even in their massive bank of records. Although I hadn't thought of trying the New York ports - hmmm.

Just recently I discovered that the person whose obtituary says she was born in New Orleans, January 21, 1861 may have been born "at sea" - according to her son's statement in the 1920 census.

This pins down the ship's travel time to late 1860 or early 1861.
Unfortunately, most on-line passenger lists for New Orleans seem to end at 1850 or so.

I'm assuming the mother died in childbirth. She doesn't show up in any death records, so I'm wondering if she died at sea and was buried at sea.   Again, thanks for the ideas.