Reproduces about 6700 German emigrant letters from the United States written between 1820 and 1930, collected by Wolfgang Helbich. About 85% are in the form of Xerox copies of the originals, 10% are in transcription form only (the originals have been lost), and 5% are the original letters. Biographical research and background studies on the letter writers is reproduced along with the letters, including parish registers, emigration lists, judicial records, passenger lists, manuscript census, city directories, county histories, platbooks, etc.