The Mary Anne Atwood Papers contains about 700 letters and manuscripts written by British spiritual writer Mary Anne Atwood between the years 1882-1910. Most of the letters in the collection are written from Atwood to Mme. Isabelle de Steiger, a contemporary artist and Theosophist. The collection also includes other letters written and received by Atwood, manuscript drafts and notes. According to the admirers of Mary Anne Atwood, "Mrs. Atwood was truly an adept [of the metaphysical tradition]. The last one."