Sarah and I rode up to Camden Town last night to see Soweto Kinch perform one of my favorite albums, Pharaoh Sanders’s Karma, at the Jazz Cafe, in honor of the album’s fiftieth anniversary. It was a stunning night, the music heady enough to generate “eyeball movies” all on its own — eidetic glyphs and pulsing pyramids — without need of any chemical assistance. Yet the show’s good vibes didn’t last long. I slept poorly throughout the night, waking several times from panic-filled dreams, one involving an angry giant pushing a cabin off its foundations, causing the structure to tumble down a ravine. Within a few hours of this dream, Facebook announced its plan to launch a new global currency called Libra. In the hours of the morning before the key fit the lock, however, I wandered out by bus and by train into the suburbs of South London to view an exhibition called “Brilliant Visions: Mescaline, Art, Psychiatry” at Bethlem Museum of Mind.