In August 1934, young Cyril L. wrote to his friend Billy about all the exciting men he had met, the swinging nightclubs he had visited, and the vibrant new life he had forged for himself in the big city. He wrote, "I have only been queer since I came to London about two years ago, before then I knew nothing about it." London, for Cyril, meant boundless opportunities to explore his newfound sexuality. But his freedom was limite: he was soon arrested,...