One of particular note is Chronicling America which allows you to search and view over 5.2 million digitised newspaper pages drawn from newspaper titles from 26 US states (3 more are to be added next year). The collection currently covers 1836-1922.
At first glance we came across an article about Arthur Griffith written by Padraic Colum for the New York Tribune on December 25, 1921 - "The man who taught Erin to find herself".
Have a peek, who knows what you might find!