Seamus Heaney's son Mick's reflections the growing literature of contemplation of death: Joan Didion, Tony Judt, and Oliver Sacks come to mind. Seamus Heaney had no long period to reflect on the impeding end of life. His last words were a text message to his wife as he was about to head to the OR: Noli timere. Don't be afraid.
Mick Heaney: My father’s famous last words