One may also wish to consult NARA's Genealogy/ Personal History: Passenger Lists database online ( http://aad.archives.gov/aad/series-list.jsp?cat=GP44
which essentially reprents the abstracted data from the multi-volume work, Germans in America. G in A is the same resource Ancestry.com uses to base its findings regarding many of its Ships Passenger Lists. NARA's is better organized, and is a much more reliable source: I found a manifest from a SPL from ancestry ca. 1859 but, the NY arrival date seemed wrong. Everywhere I looked on line the ship (Oder) was ID'd as being built in 1873 -- then I checked the NARA databse referenced. I was able to confirm the immigration data, and later found the 1st Oden ship was commissioned in 1851. It was the 2nd -- the S.S. Oden -- that was built in 1873.