Here is what alison and I worked out all those years ago:

A Mother's Love Is A Blessing (T. P. Keenan)

      C         G         C             F                              C
An Irish boy was leaving, Leaving his native home,
F                               C             D7                                     G7
Crossing the broad Atlantic, Once more he wished to roam,
       C                G                C                            F                         C
And as he was leaving his mother, who was standing on the quay,
         F                         C                Am            F          G          C
She threw her arms around his waist, and this to him did say, (Chorus)

    C             G            C                   F                            C
A mother's love's a blessing, no matter where you roam,
F                                  C                   D7                               G7
Keep her while she's living, you'll miss her when she's gone,
C             G       C                              F                        C
Love her as in childhood, though feeble, old and grey,
                  F                      C            Am       F                     G                   C
For you'll never miss a mother's love, till she's buried beneath the clay


         C         G             C                   F                        C
And as the years go onwards, I'll settle down in life,
          F                   C                               D7                     G7               
And choose a nice young colleen, and take her for my wife,
         C         G                  C                F                           C
And as the babes grow older, and climb around my knee,
      F                        C                Am                     F            G             C
I'll teach them the very same lesson, that my mother taught to me. (Chorus )