The Pew Research Center has used US Census Bureau data to create a series of maps showing the top country of origin for for foreign-born migrants in the US by state and year, 1850–2013. In 1870, 1.8 million Irish-born people were living in the US. Image: Pew Research Center

“People imagine if they were in America it would be all sunshine. There is rain, snow, and frost too, so that it is a foolish idea to think when yo(...)