I am looking for this song, (i assume it's the correct title) but in the DT it's down as, "there's a ship lies rick and ready in the harbour...." The song i'm chasing goes something like..

Dearest mother, i am writing just to say i won't be home
There is something i must do,that i must do alone,
As i sit here in the silence of my lonely prison cell
as i write my final letter
I bid my last farerwell

(chourus)
So say goodbye to margret
Mary, Bridgit and Mee-haul ( < Don't know irish spelling for Michael)
I have no words to tell you
How much i love you all
.........................
.........................
as i write this final letter
I bid my last farewell.

Any one can point me to, or post the words I would be gratefull. Also any info on the history and story of the song would be of interest.