Read the fine print, people. These guys are very upfront:

ORIGIN: Chris came across this in a fleamarket some years back, no cover or publisher info on it, for 10p. It's pretty clear from the layout of the tunes that it was a copy of DONAL O'SULLIVAN'S work (pub. in 1958 and since reprinted by OSSIAN, CELTIC MUSIC and (I've no doubt) several others as well. Mel Bay's probably waiting in the wings to have a go at it!). The OSSIAN pub is ruled out as it does not have the "extra" tune (CAP'T O'NEILL) which Ossian included (presumably) to make it a copyrightable publication (Thanks to Seamus O'Malley of Cork who sent me that one!) : no matter, for none of the copies (to my knowledge) contained Mr. O'Sullivan's extensive notes, words to the various tunes or any of the other additional materials included in his two-volume original publication. A shame, I'd have loved to have been able to put the words up here as well, but such is life. At any rate, neither O'Sullivan nor the original publisher copyrighted the material, so I feel quite justified in putting the tunes up here. (I am since informed that there are several booksellers on the web where the originals are still available!)