I happened upon "Eleven more months and ten more days" when browsing through 101 Pub Favourites for Buskers
. The song is a short, cheerful ditty on the joys of being put in the clink for twelve months just for drinking, unsuccessfully, a gallon of beer. Our hero has just spent the first twenty days of his sentence which aptly accounts for the title, this being the duration which he still has to serve before being "... out of the calaboose"
and being "... turned loose"