Adele Marion Fielde, born in 1839, was a teacher, an evangelist, a social activist, scientist, lexicographer, writer and lecturer. As an American missionary in China she became a local teacher and evangelist, struggling to reconcile her Baptist upbringing with her restless intellect. This book provides an in-depth biographical study of the life of this remarkable woman, exploring her impact on her contemporary society, and her abiding influence on the scientific and academic communities to the present day.