AS HEARD ON RADIO 4 'Utterly wonderful' NINA STIBBE, author of Love, Nina Twenty hours have gone since I last wrote. I have been thinking of you. I shall think of you until I post this, and until you get it. Can you feel, as you read these words, that I am thinking of you now; aglow, alive, alert at the thought that you are in the same world, and by some strange chance loving me. In September 1943, Chris Barker was serving as a signalman in North...