© 2022 Johns Hopkins University Press I. He is a walking paradox: a loner who desires the crowd, “a prince who everywhere rejoices in his incognito,” a spectator who casts off his air of detachment, a skeptic who can experience states of childlike wonder, “an ‘I’ with an insatiable appetite for the ‘non-I.’” [1] More gaze than body, he is a phantom of the arcade, “a mirror as vast as the crowd itself . . . a kaleidoscope gifted with consciousness” (Baudelaire, “Painter,” 9). Who is this person?...