Columbanu's third letter on the liberties of the Irish church, and on some points of Irish history connected with the Catholic question : or, A letter from the Rec. C. O'Conor, D. D. to Owen O'Conor, Esq. - O'Conor, Charles, (printed by C. Baldwin; and published by L. B. Seeley; T. Payne; T. Egerton; Faulder and Booker; and : Gilbert and Hodges ;, 1810)