Edward Winter Clark (E. W. Clark) (February 25, 1830[1] – March 18, 1913) was an American missionary. Clark is known for his pioneering missionary work in Nagaland and for his work on transcribing the spoken Ao language into a written script.[2][3] Clark created the first bilingual dictionary of the Ao language and along with his wife, Mary Mead Clark,[4] and set up the first school in the Naga hills region of North-East India.[1] Mary Clark documented their experience in Assam and the Naga Hills in A Corner in India.[citation needed]