" He wanted her to stay, to lie in their boat with him and comfort him, but she vanished when he tried to hold her, and it was getting dark and Green rising, a baleful jade eye. There were water bottles in the racks; but the boat was gone and the salt sea with it, the sea that was a river called Gyoll in which corpses floated, savaged by big turtles with beaks like the beaks of parrots, the river that circled with whorl, the river over which the stars never set. He had come to the end of that river, and it was too "

― Gene Wolfe , Return to the Whorl (The Book of the Short Sun, #3)