Letter, 1 November 1870
Letter, 11 November 1870
Letter, 4 December 1870
Letter, 28 November 1870
Letter from H. G. Vennor to B.J. Harrington regarding the Geological Survey of Canada.
Letter from John William Dawson to B.J. Harrington, written at McGill College.
Letter, 13 May 1871
Letter from H. G. Vennor to B.J. Harrington regarding the Geological Survey of Canada.
Letter from T. Sterry Hunt to B.J. Harrington.
Letter, 12 April 1872