M. M. Magruder to Thomas Lincoln Casey, October 21, 1887

M. M. Mason to Thomas Lincoln Casey, March 1896

M. M. Parker to R. Ross Perry, October 24, 1891, copy

M. P. N. to Emma Weir Casey, January 5, 1883

M. R. Brown to Thomas Lincoln Casey, March 17, 1869

M. Rogers to Thomas Lincoln Casey, June 5, 1878

M. S. Brewer to Thomas Lincoln Casey, June 14, 1890

M. T. Armstrong to Thomas Lincoln Casey, September 5, 1892

M. Vétillard to Thomas Lincoln Casey, September 13, 1891

Mahan To Thomas Lincoln Casey, October 27, 1890

Major Duvall to Thomas Lincoln Casey, February 16, 1887

Major General Nelson Miles to Thomas Lincoln Casey, Augst 24, 1891

Major General Oliver O. Howard to Thomas Lincoln Casey, December 4, 1891

Major George H. Elliot to Thomas Lincoln Casey, July 29, 1879

Major George H. Elliot to Thomas Lincoln Casey, November 22, 1879

Major Gregory to Thomas Lincoln Casey, January 8, 1890

Major Henry M. Adams to Thomas Lincoln Casey, July 10, 1891

Major Henry M. Adams to Thomas Lincoln Casey, July 15, 1891

Major Henry M. Adams to Thomas Lincoln Casey, July 7, 1891

Major Henry M. Adams to Thomas Lincoln Casey, July 9, 1891

Major Rittenhouse to Thomas Lincoln Casey, June 2, 1885

Map, Washington Aqueduct - Potomac River at Great Falls, February 22, 1864

Maplewood Hotel to Thomas Lincoln Casey, September 16, 1889

Maplewood hotel to Thomas Lincoln Casey, September 2, 1889

Maplewood Hotel to Thomas Lincoln Casey, September 9, 1889

Mar. 31 for Colonel, undated

Marcus A. Casey to Thomas Lincoln Casey, July 30, 1869

Memorandum of proceedings in letting the Contract for Front Walls of Building for Library of Congress, November 20, 1889

Memorandum of work done on the Pub. Grds during the month of May 1878

Memorandum of work performed - Public Grounds, March 1878

Memorandum re: Requisitions to Thomas Lincoln Casey, November 20, 1891

Memorandum regarding China at White House, undated

Memorandum [notes and calculations], undated

Memorandum, Contents of two boxes, marked A and B, belonging to Thomas Lincoln Casey, undated [June 1887]

Memorandum, Heating Apparatus Library Building, undated [April 1891]

Memorandum, [Nursery and garden employees], February 1, 1879

Mercer to Thomas Lincoln Casey, December 31, 1887

Metropolitan M. E. Church to Thomas Lincoln Casey, August 29, 1879

Military Order of the Loyal Legion of the United States to Thomas Lincoln Casey, March 5, 1884

Military Order of the Loyal Legion of the United States, August 26, 1889

Minutes of meeting of Sculptors, January 26, 1894

Miss A. C. Dethick to Thomas Lincoln Casey, September 22, 1892

Miss A. C. Detrick to Thomas Lincoln Casey, October 4, 1892

Miss Foote to Thomas Lincoln Casey, undated

Miss Kernan to Thomas Lincoln Casey, undated [January 1878]

Miss Sherman to Thomas Lincoln Casey, November 27, 1877

Montgomery Meigs to Thomas Lincoln Casey, June 14, 1890

Monthly rentals chart , [New York City], 1887

Monument Half Finished, March 4, 1881

Mr. & Mrs. Pickering to Thomas Lincoln Casey, October 23, 1890