Letter from James D. Dana, 1881
Letter, 13 September 1882
Letter, 4 April 1883
Letter from George J. Brush of the Sheffield Scientific School of Yale College.
Letter from D.C. Eaton to B.J. Harrington thanking him for a specimen.
Letter from George Brush to B.J. Harrington.
Letter from E.S. Dana to B.J. Harrington.
Letter from E.S. Dana to B.J. Harrington.
Letter from Geo.J. Brush to B.J. Harrington, written from New Haven (Conneticut).
Letter from F. Adams to B.J. Harrington, written from New Haven (Conneticut).