I’ve been browsing through the Fragmentary Annals of Ireland for you know what, plague, and I came across an interesting entry.
665 Kl. The death by plague of the son of Áed Sláine, i.e. Blathmac [...], i.e. in Calatruim. Diarmait died in the same place, standing, stretched against a cross, watching the Laigin army approaching to kill him. His soul departed from him. It is found in some books that these two kings, Blathmac and Diarmait, reigned twelve years. In others, however, … years, which we follow. These two kings of Ireland, then, Blathmac and Diarmait, died in that plague, i.e. the Buide Conaill. (FA 28)
The Annals of Ulster has a king Diarmait son of Aed Slaine and a king Blathmac who died of plague. There is nothing about being “stretched against a cross, watching the Laigin army approaching to kill him.” I don’t think that I’ve seen anything quite like this before. This would seem to have a Leinster (Laigin) connection, like some of the other hints in plague lore like the name Buide Conaill itself (Conaill being the dynastic founder of the Leinster). Has anyone seen anything like this before?