John F. Weir to Thomas Lincoln Casey, December 6, 1878

John F. Weir to Thomas Lincoln Casey, February 25, 1882

John F. Weir to Thomas Lincoln Casey, January 13, 1872

John F. Weir to Thomas Lincoln Casey, November 11, 1880

John F. Weir to Thomas Lincoln Casey, November 2, 1886

John F. Weir to Thomas Lincoln Casey, November 21, 1878

John F. Weir to Thomas Lincoln Casey, November 5, 1886

John F. Weir to Thomas Lincoln Casey, October 10, 1881

John F. Weir to Thomas Lincoln Casey, October 12, 1881

John F. Weir to Thomas Lincoln Casey, October 15, 1881

John F. Weir to Thomas Lincoln Casey, September 10, 1880

John F. Weir to Thomas Lincoln Casey, September 11, 1880

John F. Weir to Thomas Lincoln Casey, September 25, 1880

John G. Ames/Department of the Interior to Thomas Lincoln Casey, January 2, 1895

John G. Carlisle to Daniel S. Lamont to Thomas Lincoln Casey, April 3, 1894, copy

John G. D. Knight to Thomas Lincoln Casey, December 8, 1873

John G. Knight to Thomas Lincoln Casey, August 31, 1895

John G. Parker to Thomas Lincoln Casey, July 25, 1894

LeComt to Thomas Lincoln Casey, May 31, 1855

Lee to Thomas Lincoln Casey, August 9, 1886

Lee to Thomas Lincoln Casey, July 23, 1874

Letters &c Received from Augst. 15th 1881 to Sept. 23 1881 by Colonel [Thomas Lincoln] Casey U. S. Army

Level on 500 foot course, September 18, 1884

Levels of Top of Columns at 240 + 250, undated

Lewis C. Hunt to Thomas Lincoln Casey, April 11, 1886

Lewis C. Hunt to Thomas Lincoln Casey, February 26, 1886

Lewis C. Hunt to Thomas Lincoln Casey, June 1, 1881

Lewis C. Hunt to Thomas Lincoln Casey, May 24, 1881 (1)

Lewis C. Hunt to Thomas Lincoln Casey, May 24, 1881 (2)

Lewis C. Hunt to Thomas Lincoln Casey, May 31, 1881

Lewis C. Hunt to Thomas Lincoln Casey, October 1, 1886

Lewis M. Haupt to Thomas Lincoln Casey, December 24, 1868

Lieut. Col. D. C. Houston to Thomas Lincoln Casey, December 18, 1886

Lieutanent [George M.] Wheeler to Thomas Lincoln Casey, January 14, 1876

Lieutanent [George M.] Wheeler to Thomas Lincoln Casey, May 26, 1876

Lieutenant Benjamin D. Greene to Thomas Lincoln Casey, April 14, 1868

Lieutenant Benjamin D. Greene to Thomas Lincoln Casey, April 20, 1868

Lieutenant Carter to Thomas Lincoln Casey, June 2, 1889, telegram

Lieutenant Clinton B. Sears to Thomas Lincoln Casey, July 3, 1872

Lieutenant Colonel D. C. Houston to Thomas Lincoln Casey, December 9, 1886

Lieutenant Colonel Jared A. Smith to Thomas Lincoln Casey, August 1, 1893, copy

Lieutenant Colonel W. H. H. Benyaurd to Thomas Lincoln Casey, October 26, 1894

Lieutenant Fred A. Meahan to Thomas Lincoln Casey, January 11, 1872

Lieutenant George M. Wheeler to Thomas Lincoln Casey, May 9, 1886

Lieutenant Greene to Thomas Lincoln Casey, July 12, 1876

Lieutenant Hinman to Thomas Lincoln Casey, February 15, 1872

Lieutenant J. A. Smith to Thomas Lincoln Casey, May 12, 1873, telegram

Lieutenant J. A. Smith to Thomas Lincoln Casey, May 13, 1873

Lieutenant J. Willard to Thomas Lincoln Casey, May 8, 1872

Lieutenant J. Willard to Thomas Lincoln Casey, May 9, 1872