Dear Richard,
I found three ship records:
Wolke Anna, 22, from Berge / Oldenburg (I don't know where Berge is located)
arrival USA: Oct. 27. 1865, ship Hansa
Port of Embarkation: Gibraltar (I think this is wrong)
Wolke Clemens, 21, from Oldenburg
ship Schiller, Bremen - Baltimore Oct. 26. 1860
Wolke Heinrich, 15, from Oldenburg
ship Hohenzollern
arrival USA May 23. 1883 (no port is given)
Werner