Irish historian, born in Dublin in 1829. He was secretary of the public record office of Ireland from 1867 to 1875: a member of the Royal Irish Academy, its professor of archæology and its librarian. He published A History of the City of Dublin (1859); Celtic Records and Historic Literature of Ireland (1861); Historic Documents of Ireland (1870); History of Affairs in Ireland from 1641 to 1652 (1881); and History of the Irish Confederation and the War in Ireland (1888).
