William L. Putnam to Thomas Lincoln Casey, December 6, 1888

William Lawrence to Thomas Lincoln Casey, February 5, 1885

William Lawrence to Thomas Lincoln Casey, November 29, 1884

William Ludlow to Thomas Lincoln Casey, December 12, 1892

William Ludlow to Thomas Lincoln Casey, December 16, 1884

William Ludlow to Thomas Lincoln Casey, July 31, 1888

William Ludlow to Thomas Lincoln Casey, November 6, 1892

William M. Evarts to Thomas Lincoln Casey, July 15, 1879

William McLean to Thomas Lincoln Casey, November 12, 1869

William N. Sweet to Thomas Lincoln Casey, December 19, 1892

William N. Sweet to Thomas Lincoln Casey, December 3, 1883

William N. Sweet to Thomas Lincoln Casey, November 18, 1892

William P. Craighill to Capt. [Thomas] Turtle, June 22, 1891

William P. Craighill to Major [Henry M.] Adams, June 26, 1891

William P. Craighill to Thomas Lincoln Casey, copy, November 7, 1892

William P. Craighill to Thomas Lincoln Casey, February 20, 1885

William P. Craighill to Thomas Lincoln Casey, July 2, 1891

William P. Craighill to Thomas Lincoln Casey, July 20, 1885

William P. Craighill to Thomas Lincoln Casey, July 9, 1891

William P. Craighill to Thomas Lincoln Casey, May 22, 1891; Bixby to Craighill, May 21, 1891

William P. Duvall to Thomas Lincoln Casey, June 15, 1885

William P. Frye to Thomas Lincoln Casey, February 28, 1891, telegram

William P. Frye to Thomas Lincoln Casey, March 28, 1888

William Palmer Hopkins to Thomas Lincoln Casey, June 22, 1885

William Palmer Hopkins to Thomas Lincoln Casey, June 28, 1885

William R. Babcock to Thomas Lincoln Casey, February 4, 1885

William R. Babcock to Thomas Lincoln Casey, October 1, 1884

William R. Davis to Thomas Lincoln Casey, undated [1877]

William Richardson to Thomas Lincoln Casey, April 7, 1885

William Rossell to Thomas Lincoln Casey, October 27, 1891

William Tindall to Thomas Lincoln Casey, February 3, 1885 (1)

William Tindall to Thomas Lincoln Casey, February 3, 1885 (2)

William Tindall to Thomas Lincoln Casey, February 4, 1885

William Whelan to Thomas Lincoln Casey, October 16, 1869

Walter L. Fisk to Thomas Lincoln Casey, October 15, 1891

Walter McFarland to Thomas Lincoln Casey, February 17, 1887

Walter McFarland to Thomas Lincoln Casey, July 9, 1888

Walter McFarland to Thomas Lincoln Casey, March 21, 1887

Walter McFarland to Thomas Lincoln Casey, May 14, 1887

Walter S. Franklin to Thomas Lincoln Casey, July 16, 1888

Walter West to Thomas Lincoln Casey, June 7, 1869

War Department Library to Thomas Lincoln Casey, May 13, 1891

War Department to Bernard R. Green, undated [August 1885]

War Department to Thomas Lincoln Casey, September 12, 1885

War Department to [Thomas Lincoln Casey], April 14, 1888

Warren Ackerman to [Frederick] T. Frelinghuysen, May 19, 1884

Warren Ackerman to [Frederick] T. Frelinghuysen, May 19, 1884, copy

Washington Aqueduct Tables, July 1881

Washington Aqueduct, Flow of Water for different levels, undated

Washington Aqueduct: Discharge of Conduit between the two reservoirs..., March 3, 1882