If you look at Chapter 20 in In Green's Jungles, you will find that there is someone besides Rigolio there who might have been somewhere/when on the Red Sun Whorl, allowing the narrator to travel to it. But not everyone can see or hear this individual. Notice also the "witch in the smoke" and what the narrator thinks about when he is drawn for the first time to the Red Sun Whorl. Where else has a witch in smoke appeared, my pretties? Where else will she appear? This is my own observation.
Marc Aramini