It's St. Patrick's Day, so the theme this week at In The Past Lane, the history podcast, is Irish American history. I start with a feature piece on why late 19th c. Americans associated Irish immigrants with terrorism. Next, it's a feature on Hercules Mulligan, the Irish immigrant who served as a trusted spy against the British during the American revolution. You might recognize his name if you've seen "Hamilton, The Musical," or listened to the soundtrack.