On www.immigrantships.net I found a passenger list with Anna Dramann, 56 (?), with 6 children coming from Damme and arriving in Baltimore 3 Feb 1849, final destination is Cincinnati. In Damme we had a widow Drahmann from Osterfeine who emigrated with her children in 1848. I think that is the same family. On the passenger list is a son Heinrich, 20 (?). That could be your Ernst H. Therefore I send a copy of this email to Mr. Honkomp. I think he can have informations about this Drahmann family.
Best regards,
Gunter