When I first saw Georgiana Houghton’s spirit drawings, I felt an instant, almost bodily recognition: Oh, she was listening to the same hum. Houghton, a Victorian gentlewoman (1814-1884), claimed that spirit guides—Titian, Correggio, and dead relatives, moved her hand. The result was a web of translucent strands, loops, and knots so intricate that even now they look as if they’ve been plotted by software. No horizon, no figure: just thread-like energy fields curling across the page.