T. S. Jenkins to Thomas Lincoln Casey, February 18, 1885

T.B. Harrington to Thomas Lincoln Casey, February 13, 1896

TBS - Potomac River Embankment - Formula for discharge of sleuces, June 6, 1877

The Century Association to Thomas Lincoln Casey, October 15, 1892

The Century Club of NY, [December 25], 1889

The Century [Club] to Thomas Lincoln Casey, February 5, 1887

The Engineering & Building Record and the Sanitary Engineer to Thomas Lincoln Casey, October 10, 1887

The following files from the Off. of Bldg for S. W. & N Depts., April 3, 1888

The Garfield Memorial Association to Thomas Lincoln Casey, May 1, 1890

The Hubbell Patent System, October 22, 1885

The Journal to Thomas Lincoln Casey, February 29, 1896

The Mississippi River Commission to Thomas Lincoln Casey, February 8, 1890

The National Bank of the Republic to Thomas Lincoln Casey, April 1, 1891

The National Bank of the Republic to Thomas Lincoln Casey, August 7, 1888

The National Bank of the Republic to Thomas Lincoln Casey, January 2, 1891

The National Bank of the Republic to Thomas Lincoln Casey, January 3, 1891

The National Bank of the Republic to Thomas Lincoln Casey, September 20, 1889

The Public Service Review to Thomas Lincoln Casey, August 12, 1889

The Public Service Review to Thomas Lincoln Casey, August 13, 1889

The Public Service Review to Thomas Lincoln Casey, November 17, 1888

The Public Service Review to Thomas Lincoln Casey, November 2, 1889

Theodore B. Samo to Thomas Lincoln Casey, April 9, 1879

Theodore B. Samo to Thomas Lincoln Casey, March 9, 18178

Theodore B. Samo to Thomas Lincoln Casey, September 8, 1881

Theodore B. Samo, Washington and Georgetown Harbor tides, April 24, 1878

Thomas Barr to Thomas Lincoln Casey, July 10, 1888

Thomas Barr to Thomas Lincoln Casey, June 30, 1884

Thomas Lincoln Casey to Jones, undated [March, 1878]

Thomas Lincoln Casey to Judge Ourham, January 6, 1887, copy

Thomas Lincoln Casey to Lt. Martin, April 15, 1891

Thomas Lincoln Casey to Lucy Webb Hayes, August 1879, draft

Thomas Lincoln Casey to M. M. Parker, October 27, 1891

Thomas Lincoln Casey to Marrin H. Sauger, December 24, 1890; Sauger to Thomas Lincoln Casey, December 26, 1890

Thomas Lincoln Casey to Milton J. Durham, December 17, 1888, handwritten copy

Thomas Lincoln Casey to Milton J. Durham, December 17, 1888, typewritten copy

Thomas Lincoln Casey to Milton J. Durham, December 21, 1888, handwritten copy (1)

Thomas Lincoln Casey to Milton J. Durham, December 21, 1888, typewritten copy (2)

Thomas Lincoln Casey to Mr. Beaufue, February 11, 1891

Thomas Lincoln Casey to Mr. Haight, May 23, 1887, draft

Thomas Lincoln Casey to Mr. Hamlin, February 1, 1878, draft

Thomas Lincoln Casey to Mr. O'Neall, November 25, 1878

Thomas Lincoln Casey To President of the United States, May 22, 1891

Thomas Lincoln Casey to President [Benjamin Harrison], July 9, 1891

Thomas Lincoln Casey to Robert T. Lincoln, August 8, 1882

Thomas Lincoln Casey to Robert T. Lincoln, January 7, 1882

Thomas Lincoln Casey to Robert T. Lincoln, July 2, 1884

Thomas Lincoln Casey to Robert W. Watson, January 24, 1891

Thomas Lincoln Casey to Rutherford B. Hayes, around July 19, 1881 (draft)

Thomas Lincoln Casey to Rutherford B. Hayes, August 31, 1879, draft

Thomas Lincoln Casey to Rutherford B. Hayes, June 1881, draft