Entirely Unofficial Rest is History Catalogue and Interrogator

Annals of the Four Masters by Mícheál Ó Cléirigh, Cú Choigcríche Ó Cléirigh, Fearfeasa Ó Maol Chonaire, Cú Choigríche Ó Duibhgeannáin

All here, all linked, all searchable.