S. Polaud to Thomas Lincoln Casey, February 25, 1889

S. Polaud to Thomas Lincoln Casey, February 9, 1889

S. Q. C. Lamar to General Humphrey, February 2, 1876

S. V. Benet to Thomas Lincoln Casey, December 1870

S. V. Benet to Thomas Lincoln Casey, June 1871

Sadie Gould to Thomas Lincoln Casey, September 2, 1882

Sadie L. Gould to Thomas Lincoln Casey, February 1, 1882

Sam Randall to Thomas Lincoln Casey, April 12, 1875 (1)

Sam Randall to Thomas Lincoln Casey, April 12, 1875 (2)

Sam Randall to Thomas Lincoln Casey, February 8, 1889

Samuel C. Cobb to Thomas Lincoln Casey, February 22, 1882

Samuel C. Cobb to Thomas Lincoln Casey, February 24, 1882

Samuel C. Cobb to Thomas Lincoln Casey. February 20, 1882

Samuel M. Matson to Thomas Lincoln Casey, May 17, 1856

Samuel Pierce Clark to Thomas Lincoln Casey, January 4, 1856

Samuel Ward Green to Thomas Lincoln Caseye, May 21, 1895

Samuel Ward Greene to Thomas Lincoln Casey, August 18, 1882

Sarah Burlingame Webster to Thomas Lincoln Casey, June 15, 1895

Sarah Burlingame Webster to Thomas Lincoln Casey, June 26, 1895

Sarah N. Barnswell, undated [1882]

Sarah N. Randolph to Thomas Lincoln Casey, May 12, 1882, telegram

Sarah N. Randolph to Thomas Lincoln Casey, May 19, 1882

Sarah N. Randolph to Thomas Lincoln Casey, May 6, 1882

Savage to Thomas Lincoln Casey, October 5, 1895

Schedule of Cubes of Concrete made for Tests, October 17, 1879

Schedule of Memorial Stones now set in the interim walls of the Washington Monument prior, March 16, 1885

Schedule of Memorial Stones now set in the interim walls of the Washington Monument prior, March 16, 1885.

Scheme [class schedule]

Schuyler Duryee to Thomas Lincoln Casey, April 12, 1892

Scott Werner & Co. to Thomas Lincoln Casey, April 23, 1856

Scott Werner & Co. to Thomas Lincoln Casey, June 7, 1856

Selwyn Z. Borman to Thomas Lincoln Casey, January 28, 1880

Senate committee to Thomas Lincoln Casey, February 16, 1889, telegram

Senate committee to Thomas Lincoln Casey, February 9, 1889, telegram

Senator George Graham Vest to Thomas Lincoln Casey, January 29, 1894

Senator J. B. Beck to Thomas Lincoln Casey, January 4, 1888

Richard L. Hoxie to Thomas Lincoln Casey, undated [1880]

Richard M. Hunt to Thomas Lincoln Casey, January 15, 1882

Richard Ward Green to Thomas Lincoln Casey, September 5, 1894

Richard Ward Greene to Thomas Lincoln Casey, August 18, 1894

Richard Ward Greene to Thomas Lincoln Casey, August 23, 1894

Richard Ward Greene to Thomas Lincoln Casey, May 15, 1893

Richard Ward Greene to Thomas Lincoln Casey, May 17, 1893

Riggs & Co. to Thomas Lincoln Casey, November 16, 1882

Risheill Hooge to Thomas Lincoln Casey, January 10, 1870

Risheill Hooge to Thomas Lincoln Casey, January 24, 1870, receipt

Robert B. Hunt to Thomas Lincoln Casey, March 16, 1886

Robert C. Winthrop to Thomas Lincoln Casey, December 29, 1881

Robert C. Winthrop to Thomas Lincoln Casey, March 20, 1882

Robert C. Winthrop to Thomas Lincoln Casey, May 16, 1886