Letter to Daniel Coit Gilman, 1897(?)
Letter to H.C. Yarrow
Letter to Daniel Coit Gilman
Letter to Daniel Coit Gilman
Letter to Adelaide E. Proctor
Letter to George Miller Sternberg
Letter to Anson Phelps Stokes, April 17, 1913
Letter to James William White, April 19, 1913
Letter to Henry Vining Ogden, January 8, 1904
Letter to Arnold Carl Klebs, January 15, 1904