Probobly no help but in the chance... I posted this on the Schnoor board:
There is a biography of Max Christian Schnoor born 11 Nov. 1819. Max married Dora Kleinfeldt, daughter of Franz and Anna (Niebuhr)** Kleinfeldt. Includes names of children..places of residence. ****
Mentions Milwaulkee WI. as a locality of this family...I believe Milwaulkee is fairly close to Chicago. Detroit is another locality. New Baltimore is another.
I also posted data about Gustav Neibuhr today. He was on ship with my grandmother Dora Schmidt-Sahs.