there he would explain that what had happened to eustace was a striking illustration of the turn of fortune 's wheel , and that if he had eustace at his own house in narnia ( it was really a hole not a house and the dragon 's head , let alone his body , would not have fitted in ) he could show him more than a hundred examples of emperors , kings , dukes , knights , poets , lovers , astronomers , philosophers , and magicians , who had fallen from prosperity into the most distressing circumstances , and of whom many had recovered and lived happily ever afterwards .