the song you refer to started life as a music hall recitation in the 1920's, and was printed as a story in the Reader's Digest in 1937. The lyrics for the sung version were put together by Pat Cooksey and first performed at a folk club in Coventry in 1969. Since then it has been recorded over 100 times, and under at least 12 different titles, one of which is "Murphy and the Bricks" (that version was variously by Noel Murphy and the Houghton Weavers). The title of the song, as written, is "The Sick Note", perhaps the best known version under a similar title (Paddy's Sick Note)is that by the Dubliners.