Letter, 5 September 1876
Letter, 28 September 1876
Letter, 21 October 1876
Letter from A.S. Bickmore to B.J. Harrington.
Letter from S.W. Ford to B.J. Harrington.
Letter, 8 March 1877
Letter from H.A. Roebling to B.J. Harrington.
Letter from J.J. Stevenson to B.J. Harrington.
Letter, 19 November 1877
Letter, 4 December 1877