Primrose, Violet, and Daffodil--the flower children of Lady Balaclava--come from all over once a year on their mother's birthday and as she had feared, death overtakes her. A/though there is deadly parathion in the greenhouse, no toxic agent seems to have been responsible. Nor can one quite suspect (or perhaps reconcile after the fact)just who the culprit is. . . . Henry Tibbett again presides and contributes to the genteel, calmative effect.