Had a look in the Irish Traditional Music Archive today.

- they have the Moffat book alright.
- no copy of Horncastle's book, though there is one, apparently, in the National Library of Ireland. That said, it appears, so far, that Moffat's text is taken from it.
- Nothing in Ransome.
- BUT it shows in several of Walton's publications over the years, often under the title "Of all the fish that's in the sea". This is a very likely source for Healy's set, methinks.


The water is muddied in several cases where it is unclear whether authors are talking about the song set or the air.

Regards
p.s. For the Choice Aeons among us - there's a copy of the relevant pages from Moffat in Ruth Bauerle's "The James Joyce Songbook"