Memorandum concerning Elevator Engine and its velocity + power, undated

Memorandum Concerning Frame Work, undated

Memorandum concerning Lightning Rods, undated

Memorandum concerning the Monumental Column to be Erected at Yorktown, Virginia, July 15, 1880

Memorandum for Lt. Kurtz, undated

Memorandum from H. K. Thurber & Co., May 18, 1872

Memorandum from Thomas Lincoln Casey, December 30, 1886

Memorandum funds, 1878-1879

Memorandum of Cost of Lamp Posts, undated

Memorandum of dyke of basin, undated [1878]

Memorandum of Enclosures from Thomas Lincoln Casey, December 31, 1886

Memorandum of Enclosures to Thomas Lincoln Casey, December 31, 1886

Major [George H.] Elliot to Thomas Lincoln Casey, 1873 (1)

Major [George H.] Elliot to Thomas Lincoln Casey, 1873 (2)

Major [George H.] Elliot to Thomas Lincoln Casey, August 14, 1871

Major [George H.] Elliot to Thomas Lincoln Casey, August 1874

Major [George H.] Elliot to Thomas Lincoln Casey, December 12, 1870

Major [George H.] Elliot to Thomas Lincoln Casey, December 6, 1870

Major [George H.] Elliot to Thomas Lincoln Casey, February 19, 1874

Major [George H.] Elliot to Thomas Lincoln Casey, January 25, 1871

Major [George H.] Elliot to Thomas Lincoln Casey, July 1871. (1)

Major [George H.] Elliot to Thomas Lincoln Casey, July 1871. (2)

Major [George H.] Elliot to Thomas Lincoln Casey, July 1871. (3)

Major [George H.] Elliot to Thomas Lincoln Casey, July 1871. (4)

Major [George H.] Elliot to Thomas Lincoln Casey, July 20, 1872

Major [George H.] Elliot to Thomas Lincoln Casey, June 2, 1871. (1)

Major [George H.] Elliot to Thomas Lincoln Casey, June 2, 1871. (2)

Major [George H.] Elliot to Thomas Lincoln Casey, March 28, 1871

Major [George H.] Elliot to Thomas Lincoln Casey, March 7, 1873

Major [George H.] Elliot to Thomas Lincoln Casey, May 1871

Major [George H.] Elliot to Thomas Lincoln Casey, November 30, 1870

Major [George H.] Elliot to Thomas Lincoln Casey, October 13, 1870

Major [George H.] Elliot to Thomas Lincoln Casey, October 21, 1870

Major [George H.] Elliot to Thomas Lincoln Casey, October 8, 1870

Major [George] H. Mendell to Thomas Lincoln Casey, March 1872

Major [George] W. Mendell to Thomas Lincoln Casey, December 30, 1875

Major [Gouverneur] K. Warren to Thomas Lincoln Casey, May 17, 1872

Major [James] A. Smith to Thomas Lincoln Casey, May 7, 1876

Major [James] McMillan to Thomas Lincoln Casey, March 5, 1872

Major [James] McMillan to Thomas Lincoln Casey, May 27, 1871

Major [John] M. Wilson to Thomas Lincoln Casey, December 4, 1872

Major [William R.] King to Thomas Lincoln Casey, March 9, 1873

Major [William] P. Craighill to Thomas Lincoln Casey, December 20, 1873

Major [William] R. King to Thomas Lincoln Casey, April 13, 1876

Major [William] R. King to Thomas Lincoln Casey, April 23, 1874

Major [William] R. King to Thomas Lincoln Casey, August 18, 1871

Major [William] R. King to Thomas Lincoln Casey, December 14, 1871

Major [William] R. King to Thomas Lincoln Casey, December 18, 1871

Major [William] R. King to Thomas Lincoln Casey, December 21, 1871

Major [William] R. King to Thomas Lincoln Casey, December 24, 1873