I'm a tad confused: were their 2 pair of black pumps, both with missing rosettes? If NOT, then when did Innes and Nut Tart switch shoes and why? And when? Pym, at the end, notes the cold eyes of Nut Tart and assumes Nut Tart is the killer. But why would Nut Tart bother? I know this is Pym's story, and I know her story is wrapped up, but I'm confused. Thanks!