Amanda Feilding, who was born in 1943, is an eccentric as only the English aristocracy can breed them. (She's descended from the house of Habsburg and two of Charles II's illegitimate children.) A student of comparative religion and mysticism, Feilding has had a long-standing interest in altered states of consciousness and, specifically, the role of blood flow to the brain, which in Homo sapiens, she believes, has been compromised ever since our species began standing upright. LSD, Feilding believes, enhances cognitive function and facilitates higher states of consciousness by increasing cerebral circulation. A second way to achieve a similar result is by means of the ancient practice of trepanation. This deserves a brief digression.