When I was a child (about a thousand years ago) there was a BBC radio programme called "Children's Favourites". They seemed to play exactly the same records every week and this was one of them. I heard it so often that I don't need the record. I can hear every single word of it in my head, "I'm a troll, fol-de-rol etc." Then there was "The Runaway Train" and "Nelly the Elephant". Ah, the nostalgia.