When his attempts to persuade Judith to give Allerton up merely antagonise her, the worried father plans Allerton's murder. He falls asleep while waiting to poison Allerton, relieved he took no action when he awakes the next day. Last, Barbara Franklin, wife of Judith's employer Dr Franklin, dies the following evening. _She_ was poisoned with physostigmine sulphate, an extract from the Calabar bean that her husband researches. <sep>, Pronoun: She