 She did a considerable amount of teaching and (unusually for respectable young women of the period) fearlessly canvassed the streets alone at night near Victoria Station for prostitutes who might be persuaded to train for an employable skill or to simply spend a night in a hostel.In 1884, suffering from physical and emotional exhaustion, she underwent surgery which, though "slight in nature … left her very ill." Apparently her heart was permanently damaged in the process.During the next few years, Trotter felt an impulse toward missionary work in non-Christian lands, even telling one of her friends that "whenever she prayed, the words 'North Africa' sounded in her soul as though a voice were calling her."