Amelia J. Rowland to Thomas Lincoln Casey, April 7, 1880

Amelia J. Rowland to Thomas Lincoln Casey, June 24, 1880

Amelia J. Rowland to Thomas Lincoln Casey, March 2, 1881

Amelia J. Rowland to Thomas Lincoln Casey, March 3, 1880

Amelia Waite to Thomas Lincoln Casey, May 10, 1889

American Geographical Society to Thomas Lincoln Casey, December 23, 1886

American Home Missionary Society to Thomas Lincoln Casey, June 17, 1858

American Society of Civil Engineers to Thomas Lincoln Casey, March 15, 1881, invitation

American Society of Civil Engineers, March 30, 1882, circulars

American Society of Engineers to Thomas Lincoln Casey, December 1, 1882, bill

Amos Perry to Thomas Lincoln Casey, October 24, 1882

Amos Stickley to Thomas Lincoln Casey, October 12, 1868

Amos Stickney to Thomas Lincoln Casey, April 10, 1889

Amos Stickney to Thomas Lincoln Casey, March 15, 1889

Amos Stickney to Thomas Lincoln Casey, May 5, 1889

An act to make contribution toward the completion of the Washington National Monument, undated [July 1872]

Anita R. Newcomb to Thomas Lincoln Casey, June 13, 1882

Anna C. W. to Emma Weir Casey, August 19, 1895

Anna C.W. to Emma Weir Casey, August 19, 1895

Anna Gould to Emma Weir Casey, December 29, 1882

Anna Gould to [Emma Weir] Casey, March 25, 1889

Anna H. Eldridge to Thomas Lincoln Casey, August 19, 1895

Anna Weir to Thomas Lincoln Casey, May 28, 1895

Anne H. Cressen to Thomas Lincoln Casey, September 21, 1895

Anne H. Cressen to Thomas Lincoln Casey, September 28, 1895

C. W. Raymond to Thomas Lincoln Casey, August 7, 1894

C. W. Raymond to Thomas Lincoln Casey, December 13, 1893

C. W. Raymond to Thomas Lincoln Casey, February 7, 1894

C. W. Raymond to Thomas Lincoln Casey, July 24, 1894

C. W. Raymond to Thomas Lincoln Casey, March 10, 1895

C. W. Raymond to Thomas Lincoln Casey, May 9, 1895

C. W. Romney to Thomas Lincoln Casey, December 8, 1878

C. Warren to Thomas Lincoln Casey, 1873

C. [Seaforth Stewart] to Thomas Lincoln Casey, October 25, 1872

Calculated Available Funds, May 1, 1894

Calculated distances between corners, September 16, 1880

Calculation Mag. 9. 7 Weight of new part of Monument, undated

Calculation of Ordinates from corners, October 8, 1880

Calculation of Weight of 50 ft Sections of Monument, undated

Calculation of Weight of Foundation, undated

Calculations concerning Top, undated

Calculations of Stability of Upper Part of Obelisk, undated

Calvin S. Brice to Thomas Lincoln Casey, March 9, 1894

Campbell to Thomas Lincoln Casey, May 3, 1873

Candidates for admission, September 1, 1875

Capt Royal T. Frank to Martin ; Martin to Thomas Lincoln Casey, February 18, 1872

Capt [John] W. Barlow to Thomas Lincoln Casey, March 20, 1872

Capt [Robert N.] Scott to Thomas Lincoln Casey, January 17, 1872

Capt. G. J. Fiebeger to Thomas Lincoln Casey, May 8, 1895

Capt. [William] T. Rossell To Thomas Lincoln Casey, June 20, 1888