Snuffy,
the lines on the other thread are all I know, maybe even all there are as I've always thought of it as one of those glorious "one liners" which sometimes attach themselves to tunes. Like the National Emblem March, which traditionally has the words "Have you ever caught your knackers in a rat trap..." The Charlie Chaplin connection seems to be what popularised the tune, and knowing what some of those old East Anglian musicians were like, and still are if the Eel's Foot is anything to go by, I wouldn't be surprised if the Nellie Cartwright lines go back to the tune's early days, and were then expanded by the rugby song enthusiasts to parody the Redwing song. The rest of the song is a bit of a mess, which if I remember rightly was published in the sixties in a book called "Why Was He Born So Beautiful".