T. A. Washington to Thomas Lincoln Casey, February 18, 1890

T. B. Nielson to Thomas Lincoln Casey, November 24, 1888

T. B. Reed to Thomas Lincoln Casey, August 15, 1888

T. B. Reed to Thomas Lincoln Casey, July 16, 1888

T. B. Reed to Thomas Lincoln Casey, July 22, 1888

T. C. Mendenhall to Captain L. A. Abbott, September 23, 1891

T. C. Mendenhall to Thomas Lincoln Casey, December 30, 1889

T. Crosby to [George] D. Benjamin, June 28, 1878, copy

T. H. H. [illegible] to Thomas Lincoln Casey, January 24, 1891

T. J. Campbell to Thomas Lincoln Casey, September 23, 1892

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 C. Catchings to Thomas Lincoln Casey, November 2, 1889

Thomas C. Greene to Emma Casey, May 27, 1884

Thomas C. Greene to Thomas Lincoln Casey, January 9, 1891

Thomas Coggeshall to Thomas Lincoln Casey, July 11, 1888

Thomas F. Millett to Thomas Lincoln Casey, September 29, 1890; Thomas Lincoln Casey to Thomas F. Millett, undated

Thomas Greene to Thomas Lincoln Casey, April 8, 1884

Thomas Greene to Thomas Lincoln Casey, August 7, 1885

Thomas Greene to Thomas Lincoln Casey, August 9, 1885

Thomas Greene to Thomas Lincoln Casey, February 2, 1885

Thomas Greene to Thomas Lincoln Casey, July 11, 1888

Thomas Greene to Thomas Lincoln Casey, May 6, 1887

Thomas Greene to Thomas Lincoln Casey, September 11, 1883

Thomas Harvey to Thomas Lincoln Casey, December 24, 1869 (1)