Born: 1830, Tipperary
O'Leary took part in the failed rising of 1848 and went to prison in 1849 after trying to bust the rebel leaders out of jail. He escaped from jail after serving only days of his sentence. Like other republican colleagues, O'Leary spent time in Paris in the 1850s and raised funds for the IRB. After being charged with conspiracy, O'Leary spent nine years in English jails until moving back to Paris in 1874. He returned to Ireland in the 1880s to live with his sister.
For more on O'Leary, please see http://www.searcs-web.com/oleary.html.