There is a recording of THAT'S HOW I SPELL IRELAND sung by Dennis O'Neill on YouTube; it has this additional verse:

2. Closer, lad, and kiss your dad; go kiss your mother too,
And whisper what I've told you, lad; you'll cheer her if you do,
But never spell that grand old word the way you did, you hear,
And always wear your thinkin' cap; you don't forget, my dear.