sentences:  In 1843, he joined Daniel O'Connell's movement for the Repeal of the Union Act of 1800, but quickly became dissatisfied with the lack of progress and joined "Young Irelander" movement which Smith O'Brien led and took part in the failed Young Irelander Rebellion of 1848.His participation in the rebellion obligated him to leave Ireland, and he settled for a time in Paris, where he lived in great poverty.In 1854, he joined John Mitchel in New York City, and took part in the Emigrant Aid Association, the Emmet Monument Association, and other Irish organisations.