My 3rd great-grandfather, John Dickinson, came from Yorkshire, England, to America in the 1870s. During that decade, Pittsburgh's population nearly doubled as workers for the new steel mills moved in. They were the original Pittsburgh Steelers. (Click here for photos and to learn more about John Dickinson).
For a glimpse into the life of a steel worker in Pittsburgh, check out "The Steel Workers", by John A. Fitch, 1911.