He was born in Cork, Ireland - his parents were John Therry and Eliza Connolly.
Working in Dublin and then working under the Bishop of Cork.
He arrives in Sydney with Father Philip Conolly and conducts his first Mass in Australia on the 8th of May.
This chapel would later be reconsecrated as St Mary's Cathedral
In 1839 he permanently takes up his position and works there with some success.
in May 1856, again he takes up parish work at St Augustine's, Balmain and remains there until his death.
This rank is known today as vicar capitular.