I am researching my great-great grandfathers Cornelius HARTUNG and Louis MANTZ. Both of these men migrated to the USA between 1840 and 1860 (Cornelius HARTUNG between 1856 and 1859, and Louis MANTZ sometime between 1840 and 1850). Both of these men would have been born in the 1830's, and I believe would have been of the Lutheran faith. I have found both of them with their wives (also from Germany) and families living in Pittsburgh, PA in the US Census for the years 1850 (for MANTZ only), 1860, 1870 and 1880 (for both). I am new to researching in Germany for ancestors, as well, am hoping that maybe someone out there is also looking for the same surnames. Any information would be greatly appreciated, hints and suggestions welcomed. My goal would be to find out as much as possible concerning these two men, and hopefully their wives families as well. Thanks much in advance. Mike Donahue