 When Favell was twenty the family moved back to Upper Harley Street in London to enjoy a full social life and her father bought an estate in East Barnet which he named Belmont (East Barnet).Bevan oversaw the religious education of children on her father's estates, at Fosbury, in Wiltshire and in East Barnet and her interest in educational writing grew from that experience.She developed her own method of teaching children to read based on an early kind of 'flash cards' rather than the traditional hornbook, with her "Reading Disentangled" (1834), a set of phonics flashcards, being credited by some as the first flashcards.