Plath, Sylvia ; Robert Lowell (Introduction); ARIEL - Poems by Sylvia Plath; Harper & Row; New York; 1966; First Edition; First Printing. States "First Edition" on copyright page. Original price $4.95 of front flap with blurbs by Robert Lowell, Robert Penn Warren, Anne Sexton; and "O666" printed on the lower front flap.