If I had a library, I’d visit it mornings, evenings, I’d look for books by David Henderson, co-founder of the Umbra writer’s workshop, a group that met on the Lower East Side of Manhattan in the early 1960s. At one point Henderson was married to the black feminist scholar Barbara Christian. I have a book of his on Jimi Hendrix somewhere in my basement. By the 1980s, though, Henderson started publishing with North Atlantic Books, a press founded by Miranda July’s father, the writer Richard Grossinger. I retrieved a book of Grossinger’s from my basement earlier this week. He seems to be quite a character — a magician of sorts who apprenticed under Robert Kelly. At some point I should also look for work by Calvin Hernton, another of the writers associated with the Umbra group. Hernton studied with R.D. Laing, participating in the Institute of Phenomenological Studies and the Antiuniversity of London before returning to the US in 1970. Ishmael Reed once described him as “a modern-day warlock…the man faltering governments keep their eye on. The native who has his own cabala.”