Big Mick seems to have disappeared. I can't find the Johnny Hart song in 'Irish Street Ballads', here's the tune for the other, the words differ slightly from those you quoted, so you may have to make some slight adjustments.

X:1
T:A NEW SONG CALLED GRANUAILE
S:O Lochhlainn's 'Irish Street Ballads', #3
Q:1/4=120
L:1/4
M:C
K:Fm
(A/B/)|(c/d/) (c/B/)A(e/c/)|BcE(F/G/)|(A/F/) (B/A/)FF|\
F3(A/B/)|(c/d/) (c/B/)A(e/c/)|BcE(F/G/)|(A/F/) (B/A/)FF|\
F3F/ G/|(A/B/) (c/^d/)e(c/f/)|fcB(A/B/)|c3/2B/ (c/^d/) (e/c/)|\
f3f/ ^d/|efcB/ A/|BcE(F/G/)|(A/F/) (B/A/)FF|F3|]