¹⁵Duffy, Seán. Brian Boru and the Battle of Clontarf. Dublin: Gill & Macmillan, 2013. 350.
Professor Duffy cites a poem written some two centuries after the Battle of Clontarf, in which the poet celebrates Brian Boru's sacrifice and laments the lack of a comparable hero for his own age (pp. 395-96):
On Good Friday Brian was killed
Defending the hostaged Irish,
As Christ without sin was killed
Defending the children of Adam.
When will there come the like of Brian
South or north, east or west,
Who will protect the Irish against evil
As he alone protected?