Well, Shula, this is more likely to be from Thomas Moore, son of a Dublin grocer, a writer of rather maudlin poetry who lived from 1779-1852. He was the author of a collection of ten books called Irish Melodies, and he was renowned in London as a singer of sentimental songs. The Moore poem I'm familiar with is "Believe Me, If all those Endearing Young Charms," There's also a cool one about a maiden and a canoe and a poisonous snake.....but I can't find your song.

Saint Thomas More (pronounced "Moore") was Lord Chancellor under Henry VIII, and was beheaded by henry in 1535. More's most famous work is Utopia, which he wrote in Latin.
-Joe Offer-