On February 20, 1974, Philip was recovering from the effects of sodium pentothal administered for the extraction of an impacted wisdom tooth. Answering the door to receive delivery of extra analgesic, he noticed that the delivery woman was wearing a pendant with a symbol that he called the “vesicle pisces”. This name seems to have been based on his confusion of two related symbols, the ichthys (two intersecting arcs delineating a fish in profile) that early Christians used as a secret symbol, and the vesica piscis. After the delivery woman’s departure, Dick began experiencing strange visions. Although they may have been initially attributable to the medication, after weeks of visions he considered this explanation implausible. “I experienced an invasion of my mind by a transcendentally rational mind, as if I had been insane all my life and suddenly I had become sane,” Dick told Charles Platt.