Excellent WomenINTRODUCED BY ALEXANDER McCALL SMITH 'I'm a huge fan of Barbara Pym' RICHARD OSMAN Mildred Lathbury is one of those excellent women who are often taken for granted. She is a godsend, 'capable of dealing with most of the stock situations or even the great moments of life birth, marriage, death, the successful jumble sale, the garden fete spoilt by bad weather'. Her glamorous new neighbours, the Napiers, seem to be facing a marital crisis. One cannot