Does anyone know what the following record from the Passenger and Immigration Index is or what info I would get from the source listed? Isaac Cox found in: Passenger and Immigration Index, 1500s-1900s Place: Dubuque Co., IA Year: 1851 Age: 44 Primary immigrant: Cox, Isaac Permanent entry number: 1173593 Accession number: 9564783 Source publication code: 3813 Source publication page number: 20 Source publication: KEY CITY GENEALOGICAL SOCIETY, copier. Book 1 of Naturalization Declarations, 1832-1856, Dubuque County, Iowa. Des Moines: Iowa Genealogical Society, 1982. 61p. Source annotation: Indexed names are located in Section II. Source: Passenger and Immigration Lists Index Thanks. Amy Davidson