There is another song Luke Kelly sings with the same name written by Canon Charles 
O'Neill in 1919. However this is a lamentful love song that dates back to 1815 
this is one of the beautiful luke kelly songs. Simple accompaniment of guitar and 
a little tin whistle.

C Am C

Cmaj9 (x3243x@1)  Am (x02210@1)   C (x32010@1)     F (133211@1)                  CWhen (x32010@1)I was a bachelor, airy and young, I followed the roving trade,
               Cmaj9 (x3243x@1)    Am (x02210@1)  C (x32010@1)       F (133211@1)               CAnd (x32010@1)the only harm that ever I done, was courting a servant maid.
          Cmaj9 (x3243x@1)Am (x02210@1)     C (x32010@1)   F (133211@1)                     CI (x32010@1)courted her all summer long, and part of the winter, too
               Cmaj9 (x3243x@1)  Am (x02210@1)      CAnd (x32010@1)many's the time I rolled my love 
F (133211@1)                 C (x32010@1)name="chord_x3243x@1">Cmaj9 Amall (x02210@1)over the foggy dew dew dew.
F (133211@1)                 Call (x32010@1)over the foggy dew

One night as I lay in my bed, taking my pleasent sleep.
This pretty young maid she came to me, and bitterly she did weap.
She tore her hair,and she wrung her hands.Saying, oh what shall I do.
For tonight I resolve to sleep with you, 
For fear of the foggy dew, dew, dew.
For fear of the foggy dew.

All in the first part of that night we rolled and sport and play.
All in the latter part of that night she in my arms did lay
And when the daylight did appear She cried, I am undone
Aw hold your tongue you silly young girl 
For the foggy dew is gone, gone, gone
For the foggy dew is gone

Supposing you should have a child It would make you laugh and smile
And suppose you have another one It would make you think a while
And suppose you have another one, And another one or two
It would make you leave off them foolish young tricks,
and think on the foggy dew, dew, dew
and think on the foggy dew

I love that girl with all my heart she's as dear as my lovely life
But in the latter part of that year She became another mans wife
But, i'd never told him of her faults and I'm damned if e'er I'll do
And many is the time she winks and smiles
I think on the foggy dew, dew, dew
I think on the foggy dew