Consists of personal and business correspondence, circulars, journal articles, brochures, leaflets, newscuttings, newsletters, notes, pamphlets, sermons and service sheets. They record Harrison's long and distinguished career as a minister of the Presbyterian church. Correspondents include Alice, Duchess of Gloucester, Viscount and Viscountess Slim, Sir Robert and Dame Pattie Menzies and Elsie Curtin, wife of John Curtin.