John B. Marble to Thomas Lincoln Casey, August 16, 1892

John B. Peirce to Thomas Lincoln Casey, April 11, 1883

John B. Peirce to Thomas Lincoln Casey, April 16, 1883

John B. Peirce to Thomas Lincoln Casey, February 19, 1883

John B. Peirce to Thomas Lincoln Casey, January 12, 1883

John B. Peirce to Thomas Lincoln Casey, January 19, 1883

John B. Peirce to Thomas Lincoln Casey, June 2, 1883

John B. Peirce to Thomas Lincoln Casey, June 21, 1883

John B. Peirce to Thomas Lincoln Casey, June 4, 1883

John B. Peirce to Thomas Lincoln Casey, June 8, 1883

John B. Pierce to Thomas Lincoln Casey, February 9, 1884

John B. Pierce to Thomas Lincoln Casey, January 29, 1884

John Beattie to Col. D.C. Houston, January 31, 1891

John Bogart to Thomas Lincoln Casey, April 16, 1890

John Bogart to Thomas Lincoln Casey, December 3, 1885

John Bogart to Thomas Lincoln Casey, February 18, 1885

John Bogart to Thomas Lincoln Casey, January 5, 1883

John Bogart to Thomas Lincoln Casey, June 26, 1884

John Bogart to Thomas Lincoln Casey, March 27, 1885

John Bogart, American Society of Civil Engineers to Thomas Lincoln Casey, March 20, 1884

John C. Goodridge to W. W. Corcoran, February 10, 1885, copy

John C. Houk to Thomas Lincoln Casey, January 23, 1893; John C. Houk to T. S. Godfrey, January 21, 1893 [copy]; John Houk to Stephen D. Elkins, undated [transcription]

John C. Houk to [Stephen] B. Elkins, January 16, 1893

John C. Houk to [Stephen] B. Elkins, January 21, 1893 (1)

John C. Houk to [Stephen] B. Elkins, January 21, 1893 (2)

John C. Tidbull to Thomas Lincoln Casey, October 24, 1889

John Campbell Harris to Thomas Lincoln Casey, March 6, 1891

John Dickinson to General Bennett, November 10, 1887, copy

John Eaton to Thomas Lincoln Casey, February 4, 1885

John Eaton to Thomas Lincoln Casey, January 19, 1891

John Elliott to Thomas Lincoln Casey, September 22, 1884

John Ely Bready to Thomas Lincoln Casey, February 20, 1896

John F. Weir to Emma [Weir Casey], January 9, 1891

John F. Weir to Emma, March 14, 1890; Thomas Lincoln Casey to John, undated

John F. Weir to Thomas Lincoln Casey, December 18, 1885

John F. Weir to Thomas Lincoln Casey, February 2, 1887

John F. Weir to Thomas Lincoln Casey, January 28, 1887

John F. Weir to Thomas Lincoln Casey, January 3, 1886

John F. Weir to Thomas Lincoln Casey, July 31, 1889

John F. Weir to Thomas Lincoln Casey, June 13, 1891

John F. Weir to Thomas Lincoln Casey, March 28, 1887

John F. Weir to Thomas Lincoln Casey, May 12, 1891

John F. Weir to Thomas Lincoln Casey, October 1, 1891

John F. Weir to Thomas Lincoln Casey, October 13, 1892

John Ferry to Thomas Lincoln Casey, January 29, 1890

John G. D. Knight to Thomas Lincoln Casey, April 30, 1891

John G. D. Knight to Thomas Lincoln Casey, December 17, 1891

John G. Hass to Thomas Lincoln Casey, April 3, 1891

John Gibbon to Thomas Lincoln Casey, January 28, 1891

Henry L. Abbot to Thomas Lincoln Casey, July 19, 1889