Lieutenant Jones to Thomas Lincoln Casey, December 7, 1874

Lieutenant M. B. Adams to General Henry L. Abbot; Henry L. Abbot to Thomas Lincoln Casey, January 23, 1872

Lieutenant Ramsay to Thomas Lincoln Casey, December 27, 1870

Lieutenant Richard L. Hoxie to Thomas Lincoln Casey, January 29, 1871

Lieutenant S. E. Tillman to Thomas Lincoln Casey, June 24, 1872

Lieutenant Savage to Major George H. Elliot, December 3, 1870

Lieutenant W. R. Livermore to Thomas Lincoln Casey, November 16, 1870

Lieutenant W. S. Stanton to General Henry L. Abbot, December 27, 1872

Lieutenant Williard to Thomas Lincoln Casey, May 16, 1870

Lieutenant [Benjamin] D. Greene to Thomas Lincoln Casey, December 8, 1868

Lieutenant [Charles] E. L. B. Davis to Thomas Lincoln Casey, April 20, 1868

Lieutenant [Charles] W. Raymond to Thomas Lincoln Casey, August 6, 1872

Lieutenant [Frederick A.] Mahan to Thomas Lincoln Casey, April 17, 1874

Lieutenant [Frederick] A. Mahan to Thomas Lincoln Casey, January 11, 1874

Lieutenant [Frederick] A. Mahan to Thomas Lincoln Casey, June 17, 1870

Lieutenant [Frederick] A. Mahan to Thomas Lincoln Casey, October 19, 1868

Lieutenant [Frederick] A. Mahan to Thomas Lincoln Casey, September 28, 1871

Lieutenant [George M.] Wheeler to Thomas Lincoln Casey, December 15, 1875

Lieutenant [George] Wheeler to Thomas Lincoln Casey, June 10, 1872

Lieutenant [Henry J.] Hunt to Thomas Lincoln Casey, February 21, 1875

Lieutenant [Henry] M. Adams to Thomas Lincoln Casey, May 4, 1874

Lieutenant [James] C. Post to Thomas Lincoln Casey, April 4, 1871

Lieutenant [John H.] Weeden to Thomas Lincoln Casey, December 30, 1872

Lieutenant [John] Weeden to Thomas Lincoln Casey, December 5, 1868

Lieutenant [Richard] Hoxie to Thomas Lincoln Casey, October 1878

Lieutenant [Richard] L. Hoxie to Thomas Lincoln Casey, December 10, 1870

Lieutenant [Thomas] Turtle to Thomas Lincoln Casey, December 3, 1875

Lieutenant [Thomas] Turtle to Thomas Lincoln Casey, November 31, 1875

Lieutenant [Thomas] Turtle to Thomas Lincoln Casey, October 3, 1874

Lieutenant [William S.] Stanton to Thomas Lincoln Casey, August 2, 1871

Lieutenant [William S.] to Thomas Lincoln Casey, March 28, 1871

Lieutenant [William S.] to Thomas Lincoln Casey, September 21, 1871

Lieutenant [William] H. Chase to Thomas Lincoln Casey, December 1, 1868

Lieutenant [William] H. Chase to Thomas Lincoln Casey, December 8, 1868

Lieutenant [William] H. Chase to Thomas Lincoln Casey, November 18, 1868

Lieutenant [William]S. Stanton to General [Henry] L. Abbot; [Henry L. Abbot] to Thomas Lincoln Casey, February 8, 1872

Lieutenant-General [illegible] to Thomas Lincoln Casey, June 20, 1892

Light House Board to Thomas Lincoln Casey, November 23, 1886

Light-House board to Thomas Lincoln Casey, December 11, 1886

Light-House Board to Thomas Lincoln Casey, October 26, 1886

Lillie Pearce to Thomas Lincoln Casey, January 16, 1882, telegram

List of bulbs, 1878

List of Employees on Roof, undated

List of Marble + Granite Cutters at Monument Slow workers, October 20, 1880

List of seats, August 24, 1876

Lizzie Briggs to Thomas Lincoln Casey, July 6, 1882

Lizzie Kernan to Thomas Lincoln Casey, May 11, 1880

Lloyd W. Bryce to Thomas Lincoln Casey, March 3, 1888

Longitude of West Point by Lunar Culminations, May 14, 1851

John B. Peirce to Thomas Lincoln Casey, April 18, 1882