Lionel Hampton’s Golden Vibes dances through me, my skin resonating like keys beneath Hampton’s mallets. During Tuesday’s performance, percussionist Sandy Blocker stood from his drums and played a balafon. Meanwhile I got bills to pay, roles to play, life pregnant with life. In the Renaissance occult imagination studied by Frances A. Yates, an “umbra” is a shadow formed by the light of the divine mind — light we can only ever seek “through its shadows, vestiges, seals” (The Art of Memory, p. 268). One of these days, I tell myself, I should track down the Nock-Festugière edition of the Corpus Hermeticum along with Norman O. Brown’s book Hermes the Thief: The Evolution of a Myth. I sit in a dark room for a few moments, in a hat and a cape, observing shadows, thinking about stars and moons, ancient debates between Egyptian and Greek philosophers arising again from memory, debates of great consequence, much of it still hidden. For Renaissance occultists like Alexander Dicson, the roots of the art of memory lie in ancient Egypt, not ancient Greece. “And if it is separated from Egypt,” he writes, “it can effect nothing” (as quoted in Yates 272).