This is my first tab and I'm positive that these are the correct chords. This is a 
very easy song to play and I play it all the time.Enjoy :)
Verse 1:
Am              G                            Am
Last night as I lay dreaming,of pleasant days gone by,
                               C                G
Me mind being bent on rambling,to Ireland I did fly,
 Am                       C                  G
I stepped on board a vision,and followed with a will,
      Am              G                              Am
Till the first I came to anchor at the cross at Spancil Hill,

Verse 2:
Am                    G                       Am              
Twas on the 23rd of June, the day before the fair 
                            C                           G
When Irelands sons and daughters and friends assembled there
      Am                        C                      G
The young,the old the brave the bold, their duty to fulfil
          Am                G                       Am
At the parish church near Clooney,a mile from Spancil Hill

(The rest of the song has the same chords - Am G Am C G Am C G Am G Am in each verse)

Verse 3:
I went to see me neighbours to see what they might say
The old ones were all dead and gone, they young ones turning grey
I met with tailor Quigley, he's as bold as ever still
Sure he used to make me britches when I lived in Spancil Hill

Verse 4:
I paid a flying visit to my first and only love
She's as fair as any lily and as gentle as a dove
she through her arms around me, saying Johnny I love ye still
She was Meg the farmers daughter and the pride of Spancil Hill