Career
He was for some time professor of theology in the Irish College in Prague. And afterwards went to Rome, where he spent the remaining years of his life in the Irish Franciscan College of Saint Isidore, fulfilling the duties of librarian. This life was again published in Rome in 1731.
He also wrote Beati Thuribii Alphonsi Mogroveii archiepiscopi Limensis vita exemplaris, published in Rome in 1683.
A copy of this work with the author"s manuscript corrections is still preserved in the library of the Royal Irish Academy. His Lima Limata conciliis, constitutionibus synodalibus et aliis monumentis.
Harold died in Rome on 18 March 1685.