R. M. O'Reilly to Thomas Lincoln Casey, November 12, 1884

R. Merry del Val to Thomas Lincoln Casey, July 22, 1888

R. Murray to Thomas Lincoln Casey, April 29, 1885

R. N. Batchelder to Thomas Lincoln Casey, February 26, 1891

R. N. Batchelder to Thomas Lincoln Casey, January 17, 1891

R. Parsons to Thomas Lincoln Casey, October 27, 1889

R. S. Hayes to [Thomas Lincoln Casey], August 31, 1891

R. S. Mackenzie to Thomas Lincoln Casey, undated[January 1879]

R. S. Smart to Thomas Lincoln Casey, August 7, 1889

R. Snowden Andrews to Thomas Lincoln Casey, May 18, 1877

R. Sunderland to Thomas Lincoln Casey, June 8, 1878

R. Tilley to Thomas Lincoln Casey, February 29, 1896

R. W. Lowrie to Thomas Lincoln Casey, March 19 [1879]

R. W. Thompson to Thomas Lincoln Casey, October 30, 1877

R. Williams, War Department to Thomas Lincoln Casey, April 23, 1891

Randall L. Gibson to Thomas Lincoln Casey, December 17, 1891 (1)

Randall L. Gibson to Thomas Lincoln Casey, December 17, 1891 (2)

Randall to Thomas Lincoln Casey, December 11, 1877

Raphael P. Thian to Thomas Lincoln Casey, February 26, 1887

Raphael P. Thian to Thomas Lincoln Casey, March 20, 1887

Ray Stone to Thomas Lincoln Casey, March 2, 1887

Raymond to Thomas Lincoln Casey, January 29, 1885

Rebecca H. Humphreys to Thomas Lincoln Casey, July 15, 1891

Rebecca H. Humphreys to Thomas Lincoln Casey, July 21, 1891

Rebecca W. Brown to Thomas Lincoln Casey, March 1, 1878

Receipt for Notice, The Washington Law Reporter, May 7, 1896

Receipt, Transportation of Leiutenant [Edward Wanton] Casey remains, January 12, 1891

Receipt, Transportation of Leiutenant [Edward Wanton] Casey remains, January 1891

Redfield Proctor to Thomas Lincoln Casey, May 14, 1891

Redfield Proctor to Thomas Lincoln Casey, May 20, 1891

Redfield Proctor to Thomas Lincoln Casey, November 21, 1890

Redfield Proctor to Tully R. Cornick,February 9, 1893, copy

Report of Senator [William P.] Frye, February 25, 1887

Report on Rivers and Harbors, December 12, 1888

Report on the State, War, and Navy Department Building, 1878

Resolution - To the Board of Consulting Engineers from Thomas Lincoln Casey, etc., January 1896

Resolution of the House of Representatives, June 17, 1878

Resolution, Vestry of St. Johns Parish, Washington D.C., February 7, 1890

Rev. John H. Elliott to Thomas Lincoln Casey, May 8, 1879

Rev. Joseph T. Kelly to Thomas Lincoln Casey, April 15, 1879

Reverend H. L. Faote to Thomas Lincoln Casey, March 2, 1896

Richard Ezdorf to Thomas Lincoln Casey, December 20, 1889

Richard Ezdorf to Thomas Lincoln Casey, July 9, 1888

Richard W. Thomson to Thomas Lincoln Casey, June 20, 1879

Richard Ward Greene to Thomas Lincoln Casey, April 11, 1891

Richard Ward Greene to Thomas Lincoln Casey, June 13, 1890

Richard Ward Greene to Thomas Lincoln Casey, May 2, 1891

Professor S. Newcomb to Thomas Lincoln Casey, January 17, 1879

Professor S. Newcomb to Thomas Lincoln Casey, May 2, 1878

Professor S. Newcomb to Thomas Lincoln Casey, undated [May 1878]