Dear Mr. Dieudonne,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Passenger Lists, 1817 - 1897 (M237) of vessels arriving at the Port of New York in the Records of the U.S. Customs Service (Record Group 36) that may include the lists of the Jennie Lind for 1847-1850. For more information about these non-digitized records, please contact the National Archives at New York (RE-NY) at firstname.lastname@example.org.
We searched the Access to Archival Databases (AAD) and located the Data Files Relating to the Immigration of Germans to the United States, documenting the period 1850 - 1897 in the Records of the Center for Immigration Research (Collection CIR) that includes 10 files pertaining to Carl Post and one file pertaining to Fred Grevel. These data files were part of the Ship Passenger Records for 1820-1912 in the Castle Garden Immigration Center Collection. The records were extracted from ship passenger lists in the Records of the U.S. Customs Service (Record Group 36). The series includes passenger lists for four separate geographic areas: Italy, the UK and Ireland, Germany (containing records on German, French, and Swiss passengers), and Russia (containing records on passengers from the Russian Empire, Austria-Hungary, the Netherlands, Scandinavia and the other countries of Europe). The lists contain passenger information such as name, age, marital status, place of last residence, and destination. This series also includes a ship manifest file and code tables which explain the values recorded in the passenger lists. For more information about the database, please contact the National Archives at College Park - Electronic Records (RDE) at email@example.com.
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We hope this is helpful. Best of luck with your research!