Set in St Basil's, an undistinguished North London parish, An Unsuitable Attachment is indeed full of the high comedy for which Barbara Pym is famed. There is Mark Ainger, the vicar, who introduces his sermons with remarks like 'Those of you who are familiar with the church of Santa Maria Maggiore in Rome.' His wife Sophia with her cat, 'I feel sometimes that I can't reach Faustina as I've reached other cats.' Rupert Stonebird, anthropologist and eligible bachelor. The well-bred Ianthe Broome wh