It was one of those Septembers when it seemed that the summer would never end. The five-mile promenade of Royale-les-Eaux, backed by trim lawns emblazoned at intervals with tricolour beds of salvia, alyssum and lobelia, was bright with flags and, on the longest beach in the north of France, the gay bathing tents still marched prettily down to the tide-line in big, money-making battalions. Music, one of those lilting accordion waltzes, blared from the loudspeakers around the Olympic-size piscine and, from time to time, echoing above the music, a man’s voice announced over the public address system that Philippe Bertrand, aged seven, was looking for his mother, that Yolande Lèfevre was waiting for her friends below the clock at the entrance, or that a Madame Dufours was demanded on the tele

