Hello all,
In one of my many non-Nabokovian lives, I study Edgar Allan Poe (and, at the moment, vision and optical devices in his fiction), who knew well Brewster's work on natural magic and the kaleidoscope. By the way, Poe's brilliant Doppelganger story, "William Wilson," one of the many subtexts of Lolita, may have added to the reflections of Pale Fire -- especially, perhaps, the global pursuit by a shadowy nemesis.
Susan Elizabeth Sweeney