Bryan Cummings to Thomas Lincoln Casey, September 10, 1880

Burdett & Titus to Thomas Lincoln Casey, August 5, 1856

Burdett & Titus to Thomas Lincoln Casey, August 8, 1856

Burdett & Titus to Thomas Lincoln Casey, July 29, 1856

Burdett and Titus to Thomas Lincoln Casey, October 18, 1855

Burr to Thomas Lincoln Casey, December 8, 1895

C. Able to Thomas Lincoln Casey, December 27, 1873

C. B. Coggeshall to Thomas Lincoln Casey, March 12, 1892

C. B. Coggeshall to Thomas Lincoln Casey, March 19, 1892

C. B. Reese to Thomas Lincoln Casey, February 19, 1868

C. Barter to Thomas Lincoln Casey, February 13, 1892

C. Briggs to Thomas Lincoln Casey, July 17, 1856

C. Briggs to Thomas Lincoln Casey, June 16, 1856

C. C. Greene to Thomas Lincoln Casey, February 5, 1894

C. C. Greene to Thomas Lincoln Casey, May 3, 1889

C. C. Stewart to Thomas Lincoln Casey, February 3, 1885

C. Crane to Thomas Lincoln Casey, January 22, 1888

C. D. Ward to Thomas Lincoln Casey, May 25, 1882

C. E. O'Neil to Thomas Lincoln Casey. June 8, 1863

C. Endicott to Thomas Lincoln Casey, September 1, 1886

C. F. Palfry to Thomas Lincoln Casey, June 25, 1888

C. Frank Dewey to Thomas Lincoln Casey, July 4, 1895

C. H. Carrington to Thomas Lincoln Casey, April 17, 1886

C. H. Carrington to Thomas Lincoln Casey, November 4, 1882

Alice W. Babcock to Thomas Lincoln Casey, February 27, 1886

Alice W. Babcock to Thomas Lincoln Casey, June 2, 1886

Alice W. Babcock to Thomas Lincoln Casey, March 31, 1886

Allan Rutherford to Thomas Lincoln Casey, February 24, 1875

Allan Rutherford to Thomas Lincoln Casey, July 6, 1874

Allan Rutherford to Thomas Lincoln Casey, November 25, 1871

Allan Rutherford, Treasury Department E. A. Paul, Chief Engineer Division, February 1873, circular

Allen Arnold to Thomas Lincoln Casey, April 8, 1889

Alston G. Dayton, U. S. Representative from West Virginia to Thomas Lincoln Casey, April 2, 1895

Alston G. Dayton, U. S. Representative from West Virginia to Thomas Lincoln Casey, April 2, 1895.

Alvan Southworth to Thomas Lincoln Casey, March 15, 1875

Alvan Southworth to Thomas Lincoln Casey, March 31, 1875

Alvey A. Adee to Thomas Lincoln Casey, April 11, 1886

Alvey A. Adee to Thomas Lincoln Casey, January 12, 1880

Amasa M. Eaton to Thomas Lincoln Casey, July 10, 1894

Ambrose E. Burnside to Thomas Lincoln Casey, May 20, 1880

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