Letter to Henry Vining Ogden, September 1, 1890
Letter to Walter Baumgarten, September 27, 1890
Letter to Henry Pickering Bowditch, February 28, 1890
Letter to Henry Vining Ogden, November 17, 1890
Letter to Richard (Dick) MacDonnell, April 6, 1891
Letter to John H. Musser, August 3, 1891
Letter to John H. Musser, 1891
Letter to Henry Vining Ogden, November 2, 1891
Letter to Henry Vining Ogden, January 5, 1891
Letter to John H./Henry Mills Hurd Musser, September 27, 1891