Describing the young Prince's chaste romance with Fleur de Fyler, Kinbote (in VN's novel Pale Fire, 1962, Shade’s mad commentator who imagines that he is Charles the Beloved, the last self-exiled king of Zembla) mentions his - or rather, his grandfather's - cheval glass, a triptych of bottomless light, a really fantastic mirror, signed with a diamond by its maker, Sudarg of Bokay: