Journalist, author, born Mallow, County Cork, Ireland, 1852; died London, England, 1928.
He took up journalism, founding and editing "United Ireland."
Elected to Parliament from Mallow, 1883, he represented different Irish constituencies until his retirement from public life, 1918.
In 1903 he was a member of the Land Conference which settled the land question.
O'Brien organized the All-for-Ireland League, 1910, and the Independent Parliamentary Party, for the union of all classes and creeds in Ireland and home rule by consent.
Prosecuted nine times for political offenses, he spent over two years in prison.
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New Catholic Dictionary