C. S. Simpson to Thomas Lincoln Casey, January 10, 1870, receipt

C. Seaforth Stewart to Thomas Lincoln Casey, April 6, 1875

C. Stone to Thomas Lincoln Casey, January 12, 1880

C. W. Jones to Thomas Lincoln Casey, undated [1880]

C. W. Raymond to Thomas Lincoln Casey, April 5, 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

At the semi-annual examination of cadets, January 22, 1852

Aug. P. Fuller to Thomas Lincoln Casey, February 13, 1882

Authority of the [Daniel S. Lamont] to Thomas Lincoln Casey, March, 15, 1895

Avery D. Andrews to Thomas Lincoln Casey, November 29, 1895

B. A. Gould to Thomas Lincoln Casey, January 2, 1892

B. A. Gould to Thomas Lincoln Casey, March 31, 1892

B. E. Alvord to Thomas Lincoln Casey, April 5, 1880

B. F. Sands to Thomas Lincoln Casey, April 14, 1873

B. F. Sands to Thomas Lincoln Casey, January 9, 1874

B. F. Stevens to Thomas Lincoln Casey, December 3, 1874

B. F. Stevens to Thomas Lincoln Casey, March 30, 1872

B. F. Stevens to Thomas Lincoln Casey, October 16, 1875

B. H. Duke to Thomas Lincoln Casey, January 7, 1873

B. Lewis Blackford to Thomas Lincoln Casey, February 14, 1889

B. W. Hanna to Thomas Lincoln Casey, January 29, 1892

Bank of the Republic to Thomas Lincoln Casey, July 17, 1881

Barbarin to Thomas Lincoln Casey, 1873

Barnard to Thomas Lincoln Casey, May 4, 1870; ED to Colonel Martin, May 5, 1870; Martin to Thomas Lincoln Casey, May 6, 1870

Baron de Rochemont to Thomas Lincoln Casey, July 28, 1895

Baron E. T. Quinette de Rochemont to Thomas Lincoln Casey, August 4, 1893

Baron Rochemont to Thomas Lincoln Casey, May 19, 1894

Baron von Eisendecker to Thomas Lincoln Casey, February 27, 1889