Please read Alexey Sklyarenko's annotations on Pale Fire, Ada and other Nabokov works here.
In his pocket diary Humbert Humbert (the narrator and main character in VN's novel Lolita, 1955) describes the first days of his stay at the Haze house in Ramsdale and calls Lolita "the loveliest nymphet green-red-blue Priap himself could think up:"