"During terms, Professor Marsden lives in Cambridge with his wife, chess player extraordinaire and distinguished physician and surgeon Bryony Asquith Marsden. His favorite time of day is half past six in the evening, when he meets Mrs. Marsden's train at the station, as the latter returns from her day in London. On Sunday afternoons, rain or shine, Professor and Mrs. Marsden take a walk along The Backs, and treasure growing old together."