I went to their club in Hampstead a couple of times in '67 or '68.
Anyway, transcribed from their 1967 LP:

Tell Ireland I Still Miss Her
(Behan)

Old jackhammer in my hand,
What is that you're saying?
We cut tracks across this land,
Further still we're straying.
I hear you old jackhammer speak
The same words that I whisper:
Words I endlessly repeat,
Tell Ireland I still miss her

Swallowtail, swallowtail,
Can't you hear me sighing?
Where to now,where to now,
Is it home you're flying?
Fly for me across the sea.
As she wakens, kiss her.
Whisper low as down you go,
Tell Ireland I still miss her

Eating here, sleeping there,
Money I keep spending.
Wages gone, hope lives on,
Toil seems never-ending.
West wind above, blow to my love,
Say my heart is with her.
Till I'm home, no more to roam
Tell Ireland I still miss her