More about said bathwater, in the words of Mary O'Hara herself, from her revised memoirs, Travels With My Harp.

from Chapter 7, quotes:
To my horror I saw them carrying on two giant cut-out shamrocks and placing them at the back of the stage. I was dumbfounded when I was asked to sit with my harp in one of them while [Dublin Mayor] Bob Briscoe was on stage. I envied the beautiful Irish wolfhound standing in the other shamrock, seemingly impervious to the indignity of it all. There's nothing wrong with the shamrock as such, but when it is perennially associated with leprechauns, shillelaghs, green beer, and Delaney's donkeys, I feel it is prostituting the true image of our beautiful country and its ancient culture. It smacks of stage-Irishism. It has echoes of Punch's earlier racist caricatures of the Irish as capering troglodytes and simian-faced morons....
Suddenly a stage-hand rushed up to me: 'Quick, there's time.' Unceremoniously I was shoved across the vast stage, had a stool pushed under me and was told, 'You're on.'   Good accommodating Irishwoman that I was, I took a deep breath and launched into "O Danny Boy, the pipes, the pipes are calling...."   It was Ed Sullivan's own choice of song. But before I could even finish one verse, I felt his patronizing hand descend on my head and heard him saying to the viewers something like, 'That's it for tonight, folks.' Off the air, he had the temerity to ask me to 'sing a little song now for the studio audience...'