 "Come Back To Erin", the sentimental tune song by the frog about a  lover longing for his Colleen, who is far away in England), was  written by "Claribel", the pseudonym of Charlotte Alington Barnard.  She was a prolific and successful English poet and composer of  ballads and hymns during the 19th century. In 1868, she had two  popular hits: "I Cannot Sing The Old Songs" and "Come Back To Erin"  ("Erin" is a traditional name for Ireland). "Erin" was her most  popular song. Over time, it became thought of as an Irish folk song,  and a generation later, it become popular on the American vaudeville  stage where such Irish songs were common.