Chris, "Give Ireland Back" was the single before "Mary Had a Little Lamb", which puts it in the early seventies - probably 1971-72. Some critics would say that of the two above mentioned songs, "Give Ireland Back" was the more childish nursery rhyme. I have no doubt it was sincere, but it was not one of Macca's better efforts lyrically. The best place to find it would be on a Wings compilation.