Although Yankton Sioux writer Zitkala-Sa (Gertrude Bonnin, 1876-1938) was, as P. Jane Hafen notes, "virtually unknown for many decades," much critical work has appeared since Dexter Fisher's 1979 article,"Zitkala-Sa: Evolution of a Writer." Some critics desiring to bring Zitkala-Sa into the conversation about turn-of-the-century American women…