When the Roman crisis arose he offered his services to Pope Pius IX against Giuseppe Garibaldi who had launched the Expedition of the Thousand.

[2] On the losing side at the Battle of Castelfidardo, the Papal States were soon reduced to the province of Lazio around Rome.

[citation needed] Subsequently, he was elected a Member of Parliament for the Longford division from 1862 to 1879, when he was appointed the Assistant Commissioner of Intermediate Education, and was one of the founders of the Irish Home Rule League (1873–82).

In addition to his historical Sufferings for the Faith in Ireland (1868), his pen was ever active in defence of the Holy See and Catholic interests.

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