Some Manistee County census records show "Posen" as the place of origin for Polish immigrants. Documents from that time rarely contained any information more specific than the vague term Posen. The Poznan Marriage Indexing Project helps descendants of those who left the Poznan area in the 19th century to identify the actual town or parish their ancestors left when departing for America. The database is located at: http://bindweed.man.poznan.pl/posen/search.php
My Fredrick family came from Posen, but I have never been able to find records on them in Germany, later an area of Poland. I was excited. I headed immediately to the website and started inputing names. My great grandfather, J. August Fredrick, was married in Manistee, Michigan, but I knew he had a sister who was married in Germany. I started inputing the sister's name and bingo! I had a hit. Here is what I found:
Protestant community in Nakło [Nakel], entry # 24 in 1862 score: Bride: 100%
Johann Zobel (27) father: Carl Zobel
Henriette Fredrich (27) father: Christoph Fredrich
Previous research on Henriette proved she had married Johann 'John' Zobel. I was so excited, I had a name of her father and a place! Further research is needed on him, but a name, oh my gosh, a glorious name, all from one post on a message board that someone generously posted.
The Poznan Project is a searchable database with marriage records from 1820-1889.