Track 1: External positions during his career at Trinity College. Track 2: Chairmanship of the Adelaide Hospital, and Presidency of the Adelaide Hospital Society in the 1980s and 1990s; medical ethics of the time. The construction of Tallaght Hospital. Track 3: Seeking election to Seanad Éireann, and to Provostship of Trinity College. Track 4: Chair of The Irish Times Trust and member of the Board of the Irish Times from 2000–2010. Track 5: President of the Zoological Society of Ireland during the 1990s; a historical background to the Society.