Just what I was looking for !
Here's the chords I worked out:
(First try w/ posting chords, hope formatting comes out ok )

C                    Am7             F       G      C
My day of toil being at an end, I fell into a sleep
Am7       G      F Am7    C      G        F
In the moment after I was on the ocean deep.
    Am7               G           F    Am7   C            G                F
Kind thoughts and pleasant memories into my mind did flow.
      C                          Am7                   F       G      C
As I sailed away with my comrades gay, from the county of Mayo.