Commissioner J. A. Williamson to Thomas Lincoln Casey, July 12, 1876

Committee on Appropriations to Thomas Lincoln Casey, November 20, 1893, telegram

Committee on Appropriations to Thomas Lincoln Casey, November 24, 1893, telegram

Comparison of Estimate and Actual time taken in Cutting Pyramidion, March 18, 1885

Computations of Height, November 24, 1879

Concerning Engineer Troops by Thomas Lincoln Casey, February 21, 1874

Concrete Beams Broken, undated [December 1881]

Congress of the United States - House Resolution, March 5, 1880

Congressional Record re: Library of Congress Building

Congressional request, undated [January 1892]

Copy of Endorsements by [S. V. Benet, J.J. Laidley], June 30, 1882

Corporal O'Neill to Thomas Lincoln Casey, July 25, 1894

Corps of Cadets, September 1875

Corps of Engineers, Special Orders, November 29, 1886

Cost of heating Apparatus in Public Buildings, undated [1893]

Cottrell & Bryer to John H. Caswell May 15, 1865

Court of Claims, Albert B. Mullett v. The United States, May 4, 1889

Creamer to Thomas Lincoln Casey, October 29, 1895

Cross Section of Strata under Monument, undated

Cubic feet of Marble, undated

D. B. Culberson to Thomas Lincoln Casey, February 11, 1893, telegram

D. C. Houston to Thomas Lincoln Casey, January 26, 1889

D. C. Houston to Thomas Lincoln Casey, May 21, 1892

D. Gardiner Tyler to Thomas Lincoln Casey, April 13, 1894

D. Garrison to Thomas Lincoln Casey, April 18, 1876

D. H. Remington to Thomas Lincoln Casey, July 12, 1893

D. H. Remington to Thomas Lincoln Casey, June 30, 1893

D. M. Rhodes to [an unknown cousin], May 6, 1880

D. McMenamin to Thomas Lincoln Casey, February 23, 1881

D. McMenamin visiting card, undated [1882]

D. Moses to Thomas Lincoln Casey, February 23, 1871

D. P. Heap to Thomas Lincoln Casey, December 9, 1886

D. S. Babcock to Thomas Lincoln Casey, July 17, 1872

D. S. Holman to Thomas Lincoln Casey, June 1, 1882

D. Turner to Thomas Lincoln Casey, July 11, 1885

D. Turner to Thomas Lincoln Casey, July 11, 1885: Ode to the Monument

D. Van Norwood to Thomas Lincoln Casey, February 8, 1859

Charles Tracey to Thomas Lincoln Casey, April 4, 1893

Charles Tracy to Thomas Lincoln Casey, October 14, 1894

Charles W. Jones to Thomas Lincoln Casey, February 2, 1880

Charles Weir to Thomas Lincoln Casey, December 22, 1894

Charles Weir to Thomas Lincoln Casey, January 20, 1892

Charles Weir to Thomas Lincoln Casey, March 15, 1895

Chase, Tinkham & Co. to Thomas Lincoln Casey, July 13, 1872

Check, General Silas Casey, July 25, 1858

Check, General Silas Casey, July 6, 1858

Christopher P. Peirce to Thomas Lincoln Casey, September 28, 1895

Circular of State Dept. to unknown, February 21, 1881

City of New York Department of Docks to Thomas Lincoln Casey, December 12, 1895

Clara Derby to Thomas Lincoln Casey, November 23, 1894; envelope