The sentence was twelve months. Twelve months of hormone injections. Stilboestrol, the drug was called—a synthetic oestrogen that would reduce the body's testosterone, that would quiet the sex drive that the law had decided was criminal. The judge called it "chemical treatment." The newspapers, when they reported it, called it "the cure." Alan Turing, sitting in the dock, had nodded as if he were receiving a mathematical result he had anticipated. Ed learned the details from Joan, who had been...